Applied Chemistry Multiple Choice Questions with Answers Part 3 by Malik Xufyan

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[Year]
Malik Xufyan
Shakarganj
Applied Chemistry M.C.Q. Part 3

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Applied Chemistry Questions and Answers – Types of Polymers
This set of Applied Chemistry Multiple Choice Questions & Answers (MCQs)
focuses on “Types of Polymers”.
1. The polymers are classified into _________ types based on the nature of
polymerization.
a) 5
b) 2
c) 3
d) 4
View Answer
Answer: b
Explanation: The polymers are classified into two types based upon their nature
of polymerization. They are homopolymers and co polymers.
2. A straight chain polymer comes under the _________ type of the
polymers.
a) Homo polymers
b) Co-polymers
c) Regular chain copolymers
d) Irregular straight chain copolymers
View Answer
Answer: a
Explanation: The straight chain polymers come under the homo polymers. The
regular straight chain copolymers and irregular straight chain copolymer comes
under the straight chain copolymers.
3. The different monomers are arranged alternatively in __________
a) Alternate straight chain polymers
b) Regular straight chain copolymers
c) Straight chain copolymer
d) Cross linked polymers
View Answer
Answer: a
Explanation: The different monomers are arranged alternatively in alternate
straight chain polymers. The regular straight chain polymers the monomeric
units arranged regularly.
4. The polymers whose backbone is made of same type of atoms called
___________

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a) Homo polymers
b) Heterochain polymers
c) Isotactic polymers
d) Atactic polymers
View Answer
Answer: a
Explanation: The polymers whose back bone is made of some type of atoms is
called as homopolymers. The heteropolymers backbone is constructed by the
two or more than two different types of atoms.
5. Tacticity of the polymers is the arrangement of the ___________ on
carbon backbone.
a) Hydrogen atoms
b) Nitrogen atoms
c) Functional groups
d) Carbons
View Answer
Answer: c
Explanation: The tacticity is defined as the arrangement of the function groups
on the carbon back bone of the polymer is called tacticity of the polymer.
6. Based on tacticity, the polymers are divided into __________ types.
a) Two
b) Three
c) Four
d) Five
View Answer
Answer: b
Explanation: Based on tacticity, the polymers are divided into three types. They
are Isotactic polymers, Atactic polymers and syndiotactic polymer.
7. The functional group are arranged on the same side of the carbon back
bone are said to be _________
a) Syndiotactic polymers
b) Atactic polymers
c) Isotactic polymers
d) Chain polymers
View Answer
Answer: c
Explanation: The functional groups arranged on the same side of the carbon
back bone then it is isotactic polymer, if they no regular arrangement then they

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are said to be Atactic polymers.
8. Which of the following is the example of the syndiotactic polymers?
a) Poly propylene
b) Poly vinyl chloride
c) Gutta percha
d) Poly lactic acids
View Answer
Answer: c
Explanation: The gutta percha is the natural form of rubber. It is the example of
the syndiotactic polymers in which the functional groups are alternately
arranged. Poly propylene and poly lactic acids are the examples of the isotactic
polymers.
9. Alternate straight chain polymers are ___________
a) Soft and flexible
b) Hard and flexible
c) Soft and brittle
d) Hard and brittle
View Answer
Answer: a
Explanation: Alternate straight chain polymers are soft and brittle nature. All the
straight chain polymers are soft and brittle.
10. Combination of the organic and inorganic polymers are called as
_________
a) Element organic polymers
b) Inorganic polymers
c) Fibres
d) Thermoplastics
View Answer
Answer: a
Explanation: Combination of the organic and the inorganic polymers are called
as the element organic polymers. It comes under the synthetic polymers
because it is produced by the synthesis.
Applied Chemistry Questions and Answers – Mechanism of
Polymerization – 1
focuses on “Mechanism of Polymerization – 1”.

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1. Mechanism of polymerisation is classified into _______ types.
a) Two
b) Three
c) Four
d) Five
View Answer
Answer: a
Explanation: Mechanism of polymerisation is classified into two types. They are
chain or addition polymerisation and the step or condensation polymerisation.
2. The functionality of the monomer is a __________ bond.
a) Single
b) Double
c) Triple
d) No
View Answer
Answer: b
Explanation: The functionality of the monomer is a double bond and bi
functional. The chain polymerisation yields the product which is exact multiple of
the monomers.
3. The polymerisation takes place by __________ of the monomer
molecules.
a) Addition
b) Self addition
c) Dissociation
d) Condensation
View Answer
Answer: b
Explanation: The polymerisation takes place by self addition of the monomer
molecules to each other through the chain polymerisation.
4. The bi products like water, methyl alcohol are produced in chain
reaction.
a) True
b) False
View Answer
Answer: b
Explanation: The bi products like water, methyl alcohol are not produced in the
chain reaction. The polymer has the same chemical composition as that of the
monomer in chain polymerisation.

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5. In how many steps the mechanism of the chain polymerisation is
carried out?
a) Two
b) Three
c) Four
d) Five
View Answer
Answer: b
Explanation: The mechanism of the chain polymerisation is carried out in three
steps. They are 1. initiation, 2. propagation and 3. termination.
6. The chain polymerisation mechanism is _______
a) Slow
b) Very slow
c) Rapid
d) Moderate
View Answer
Answer: c
Explanation: The chain polymerisation mechanism is rapid. An initiator is
required to start the polymerisation reaction.
7. The conversion of pi-bond to sigma bond during the chain propagation
releases the energy of _________ K.cal/mole.
a) 10
b) 30
c) 40
d) 20
View Answer
Answer: d
Explanation: The conversion of the pi-bond into the sigma bond during the chain
polymerisation releases the energy of the 20K.cal/mole. An initiator is needed to
start the polymerisation reaction.
8. Which of the following do not undergo the chain polymerisation?
a) Polyester
b) Vinyl
c) Allyl
d) Dienes
View Answer
Answer: a
Explanation: The polyester do not undergo the chain polymerisation. The

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compounds having the double bond undergo chain polymerisation. Olefins,
vinyl, allyl and dienes undergo chain polymerisation.
9. Addition polymerisation can be carried out in _________ mechanisms.
a) Two
b) Three
c) Four
d) Five
View Answer
Answer: b
Explanation: Addition polymerisation can be carried out in three mechanisms.
They are: 1. free radical mechanism, 2. .ionic mechanism, 3. co-ordination
mechanism.
10. Initiators are __________ compounds.
a) Stable
b) Unstable
c) Partially stable
d) Highly stable
View Answer
Answer: b
Explanation: Initiators are the unstable compounds. For getting stability, they
undergo homolytic fusion to produce free radicals.
11. For free radical chain polymerisation _________ are the good initiators.
a) Benzoyl peroxide
b) Hydrogen peroxide
c) Benzoyl peroxide and hydrogen peroxide
d) Neither benzoyl peroxide nor hydrogen peroxide
View Answer
Answer: c
Explanation: For free radical chain polymerisation, Benzoyl peroxide and
hydrogen peroxide are the good initiators. They produce monomer free radicals.
12. The ionic mechanism again divided into _____________
a) Two
b) Three
c) Four
d) Five
View Answer
Answer: a
Explanation: The ionic mechanism is again dividing into two types. They are : 1.

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cationic chain polymerisation and 2. anionic chain polymerisation.
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13. The __________ of the inhibitor result in the cationic chain
polymerisation.
a) Homolytic fusion
b) Partially homolytic fusion
c) Heterolytic fusion
d) Partially heterolytic fusion
View Answer
Answer: c
Explanation: The heterolytic fusion of the initiator results in the cationic chain
polymerisation and homolytic fusion results in a free radical polymerisation.
14. The anion is produced by the __________ initiates the anionic chain
polymerisation.
a) Homolytic fusion of initiator
b) Heterolytic fusion of initiator
c) Organo-alkali compounds
d) Inorganic compounds
View Answer
Answer: c
Explanation: The anion is produced by the organo-alkali compounds like ethyl
sodium, methyl potassium, butyl lithium etc initiates the anionic chain
polymerisation.
15. The catalyst used in the co-ordination polymerisation is __________
a) Ziegler-natta catalyst
b) Vanadium pent-oxide
c) Nitric oxide
d) Zeonar
View Answer
Answer: a
Explanation: The catalyst used in the co-ordination polymerisation is Ziegler-
natta catalyst. Combination of the metal halides and organometallic compounds
are called as Ziegler-natta catalyst.
Applied Chemistry Questions and Answers – Mechanism of
Polymerization – 2

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This set of Applied Chemistry online quiz focuses on “Mechanism of
Polymerization – 2”.
1. The step polymerisation takes place by __________
a) Addition reaction
b) Condensation reaction
c) Co-ordination polymerisation
d) Anionic polymerisation
View Answer
Answer: b
Explanation: The step polymerisation takes place by the condensation reactions
of the functional groups of the monomers. Hence it is called as condensation
polymerisation.
2. Which one of the following is not the three step polymerisation?
a) Co-ordination polymerisation
b) Anionic chain polymerisation
c) Cationic chain polymerisation
d) Step polymerisation
View Answer
Answer: d
Explanation: Step polymerisation or the condensation polymerisation is not the
three step polymerisation like initiation, propagation and termination.
3. The condensation polymerisation is ___________
a) Endothermic
b) Exothermic
c) Not exothermic
d) Neither endothermic nor exothermic
View Answer
Answer: c
Explanation: The condensation polymerisation is the not exothermic reaction. It
does not releases heat during the reaction.
4. The condensation polymerisation is the __________ process.
a) Slow
b) Very slow
c) Fast
d) Very fast
View Answer
Answer: a

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Explanation: The condensation polymerisation is the slow process. It is a step
wise process. The monomers must be dibasic acids, diols, diamines or triols.
5. Condensation polymers will release bi-products like ________
a) Ammonia
b) Hcl
c) Carbondioxide
d) Ozone
View Answer
Answer: b
Explanation: Condensation polymers will release bi-products like water,
hydrogen chloride. CH3OH etc.
6. The polymers which possess each monomer segment in regular
configuration giving a definite structure is called _____________
a) Addition polymers
b) Condensation polymers
c) Stereo regular polymers
d) Regular polymers
View Answer
Answer: c
Explanation: In stereo regular polymers. The polymers possess the monomer
segments in a regular configuration, giving a definite structural regularity as a
whole are called stereo regular polymers.
7. The structural regularity of the polymers may be due to _________
a) Isomerism
b) Optical isomerism
c) Geometrical isomerism
d) Both optical and geometrical isomerism
View Answer
Answer: d
Explanation: The structural regularity of the polymers may be due to the both
optical and geometrical isomerism.
8. The polymerisation of a diacid with diol produces ____________
a) Polyethylene
b) Poly-ethane
c) Poly-methane
d) Polyester
View Answer
Answer: d

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Explanation: The polymerisation of a diacid with diol produces the polyester.
The terepthalic acid and ethylene glycol reacts to give the polyester.
9. The functionality of the monomer must be _________
a) Two
b) Three
c) Four
d) Two or more than two
View Answer
Answer: d
Explanation: The functionality of the monomer must be two or more than two.
The monomers must be dibasic acids, diols and diamines.
10. The molecular weight of the step polymers is not the _________
a) Sum of the molecular weights of monomer
b) Sum of the molecular weight of some monomers
c) Sum of the water molecular weight
d) Sum of the weights of the bi-products.
View Answer
Answer: a
Explanation: The molecular weights of the step polymers is not the sum of the
molecular weights of the monomers. The elimination of the bi-products is done.
Applied Chemistry Questions and Answers – Methods of Polymerization
focuses on “Methods of Polymerization”.
1. How many types of methods of polymerization are there?
a) Two
b) Three
c) Four
d) Five
View Answer
Answer: a
Explanation; There are two types of methods of polymerization. They are: 1.
Emulsion polymerization and 2. suspension polymerization.
2. Emulsion polymerization is a type of polymerization that occurs in
emulsion droplets called __________
a) Emulsified droplets
b) Micelle

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c) Emulsifying droplets
d) Emulsifier droplets
View Answer
Answer: b
Explanation: Emulsion polymerization is a type of polymerization that occurs in
emulsion droplets called micelle.
3. A monomer is dispersed in a solution of_________ and ____________
forming the relatively large droplets of monomer.
a) Micelle, water
b) Surfactant, alcohol
c) Surfactant, vinegar
d) Surfactant, water
View Answer
Answer: d
Explanation: A monomer is dispersed in a solution of surfactant and water. So,
that it forms the large droplets of monomer in water.. This is due to the micelle.
4. Excess surfactant in water creates ___________
a) Micelle
b) Monomer
c) Emulsifying agent
d) Emulsifier
View Answer
Answer: a
Explanation: Excess surfactant in water creates the micelle in water. Hydrophilic
part of the surfactant molecule faces outside towards water forming a droplet
entrapping the monomer.
5. A water _____________ initiator is introduced into the water phase.
a) Soluble
b) Insoluble
c) Partially soluble
d) Neither soluble nor insoluble
View Answer
Answer: a
Explanation: A water soluble initiator is introduced into the water phase. The
initiator then diffuses through water into the micelle.
6. The concentration of the micelle is measured as __________
a) Micelle concentration
b) Critical micelle concentration

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c) Critical concentration
d) Monomer concentration
View Answer
7. The emulsion polymerisation can be mainly for the typical monomers
which undergo ____________
a) Ziegler-natta polymerisation
b) Condensation polymerisation
c) Chain radical polymerisation
d) Co-ordination polymerisation
View Answer
Answer: c
Explanation: The emulsion polymerisation is the method applied to the typical
monomers that undergoes the chain radical polymerisation. The co-ordination
polymerisation and the Ziegler-natta polymerisation are same.
8. Which of the following do not synthesized by the emulsion
polymerisation?
a) Teflon
b) BUNA -S
c) Polystyrene
d) Polyvinyl chloride
View Answer
Answer: d
Explanation: The polyvinyl chloride is not synthesized using the emulsion
polymerisation. It is produced by the suspension polymerisation method.
9. The initiators used in the emulsion polymerisation is __________
a) Dibenzyl peroxide
b) Per-sulphates
c) n-hexane
d) Silica nano particles
View Answer
Answer: b
Explanation: The The initiators used in the emulsion polymerisation method
must be soluble in water. Some of the water soluble chemicals that can be used
as initiators are per-sulphates and peroxides.
10. The final product can directly used for fabrication in emulsion
polymerisation.
a) True
b) False

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View Answer
Answer: a
Explanation: The final product can be used as directly for fabrication in emulsion
polymerisation. It is one of the advantages. High molecular weight polymers can
be produced.
11. Which of the following can be produced using suspension
polymerisation?
a) Poly methyl methacrylate
b) BUNA -S
c) Teflon
d) Polyethylene
View Answer
Answer: a
Explanation: The poly methyl methacrylate, polyvinyl chloride and high impact
polystyrene can be produced by using the suspension polymerisation.
12. Depending on the morphology of the particles, the suspension
polymerisation is carried out in ______ types.
a) Five
b) Four
c) Three
d) Two
View Answer
Answer: d
Explanation: Depending on the morphology of the particles, the suspension
polymerisation is carried out in two types. They are: 1. bead polymerisation and
2. powder polymerisation.
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13. which of the following is not used as stabilizers in the suspension
polymerisation?
a) Silica nano particles
b) n-Hexane
c) Heptane
d) n-isopropylacrylamidein
View Answer
Answer: c
Explanation: Heptane is not used as stabilizers in the suspension
polymerisation. Silica nano particles, n-Hexane and n-isopropylacrylamidein are

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used as the stabilizers in suspension polymerisation.
14. The heat obtained during the process of suspension polymerisation is
_________
a) Uncontrolled
b) Controlled
c) Moderate
d) Partially controlled
View Answer
Answer: b
Explanation: One of the advantages of the suspension polymerisation is heat
control and the polymer beads can be separated easily.
Applied Chemistry Questions and Answers – Properties of Polymers
focuses on “Properties of Polymers”.
1. Polymeric molecules __________ a definite crystalline structure.
a) Have
b) Do not have
c) Completely having
d) Partially having
View Answer
Answer: b
Explanation: The polymeric molecules do not have a definite crystalline
structure. The non-polymeric molecules have the definite crystalline structure.
2. The polymer is 100% crystalline.
a) True
b) False
View Answer
Answer: b
Explanation: No polymer is 100% crystalline or 100% amorphous. A polymer is
a mixture of the 60% crystalline and 40% amorphous.
3. As the crystallinity increases The brittleness of the polymer _________
a) Increases
b) Decreases
c) Moderate
d) Remains constant
View Answer

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Answer: b
Explanation: As the crystallinity of the polymer increases then the brittleness of
the polymer also increases. The strength and chemical resistance of the
polymers also increases.
4. A polymeric molecules possess the molecular weight _____________
a) Different
b) Fixed
c) That cannot be determined
d) May be determined
View Answer
Answer: a
Explanation: When polymerisation takes place, the growing polymeric chains
are terminated at different sizes of molecules. So, as a result the polymeric
molecules have different molecular weights.
5. Weight average molecular weight __________ on the weight of
molecules in a polymer.
a) Dependent
b) Independent
c) Partially dependent
d) Neither dependent nor independent
View Answer
Answer: a
Explanation: Weight average molecular weight depends on the weight of the
molecules of each type and determined by making use of colloidal properties.
6. The polymer absorbs ________ and swells in size.
a) Ethyl alcohol
b) Ether
c) Water
d) Methanol
View Answer
Answer: c
Explanation: The polymer absorbs the water and swells in size. Slowly polymer
goes into the solution viscous polymer solution which is heterogeneous.
7. ___________ is the property of recovering original shape after the
removal of deforming strain.
a) Rigidity modulus
b) Youngs modulus
c) Elasticity

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d) Bulk modulus
View Answer
Answer: c
Explanation: The elasticity is the property of recovering the original shape after
removal of deforming strain. Natural rubber possess high elasticity due to the
coiled helix structure of poly isoprene.
8. The impact strength is measured as _________
a) Elasticity
b) Strength
c) Permeability
d) Toughness
View Answer
Answer: d
Explanation: The impact strength is measured as the toughness. Below the
glass transition temperature the polymers break.
9. If the polymer is in the room temperature then it is ___________
a) Brittle
b) Viscofluid state
c) Amorphous
d) Rubbery
View Answer
Answer: d
Explanation: The effect of heat on polymer is high. If the temperature changes,
the state of the polymer will be changed.
10. The strength of the polymer increases with ________ in molecular
weight.
a) Increase
b) Decrease
c) No change
d) Slightly decrease
View Answer
Answer: a
Explanation: The strength of the polymer increases with an increase in the
molecular weight. The inter molecular attraction, presence of polar groups and
chain length increases the strength.
Applied Chemistry Questions and Answers – Plastics

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focuses on “Plastics”.
1. Plastics are the materials obtained by mixing the __________ with the
other ingredients which impart special engineering properties.
a) Resin
b) Monomer
c) Catalyst
d) Any polymer
View Answer
Answer: a
Explanation: Plastics are the materials obtained by mixing the resin with the
other ingredients having special engineering properties. A resin is the
polymerisation and forms the major part of the plastics.
2. Plastics are ________ in weight.
a) Very heavy
b) Light
c) Negligible
d) Heavy
View Answer
Answer: b
Explanation: Plastics are light in weight. They have good thermal and electrical
insulation. So, they do not conduct electricity.
3. The fabrication cost is __________ for plastics.
a) High
b) Low
c) Moderate
d) Very high
View Answer
Answer: b
Explanation: The fabrication cost of the plastics is low. It has easy workability. It
is chemically inert. It do not react with any other compounds.
4. The abrasion resistance of the plastic is ____________
a) Low
b) Very low
c) High
d) Moderate
View Answer

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Answer: c
Explanation: The abrasion resistance of the plastic is high. Th plastic has the
dimensional stability. It is impermeable to water.
5. The plastics are _________
a) Semi conductors
b) Conductors
c) Conducts at above room temperature only
d) Insulators
View Answer
Answer: d
Explanation: The plastics are very good insulators. They are considered as the
good engineering materials due to the this reason also.
6. Plastic resin is used in the paint industry as _________
a) Catalyst
b) Ion exchanger
c) Inhibitor
d) Coolant
View Answer
Answer: b
Explanation: Plastic is used in the paint industry as the ion exchanger in
purification of the water for boilers and as good building materials.
7. How many types of plastic resins are there?
a) 2
b) 3
c) 4
d) 5
View Answer
Answer: a
Explanation: The plastic resins are classified into two types. They are thermo
plastic resins and thermo setting resins.
8. Thermo plastics becomes ________ on heating.
a) Rigid
b) Moulded
c) Soft
d) Brittle
View Answer
Answer: c
Explanation: On heating the thermo plastic resins, they become soft and on

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cooling they become rigid reversibly. The thermo setting resins are moulded on
heating.
9. The heating and cooling of the thermo plastics _________the chemical
nature.
a) Alters
b) Do not alters
c) Alters slightly
d) May be alters
View Answer
Answer: b
Explanation: The heating and cooling of the thermo plastics do not alters the
chemical nature of these resins because the changes involved are purely of
physical nature.
10. Thermo setting plastics are formed by_________
a) Step polymerisation
b) Suspension polymerisation
c) Emulsion polymerisation
d) Co-ordination polymerisation
View Answer
Answer: a
Explanation: Thermo setting plastics are formed by the step polymerisation. The
thermo plastic resins are formed by chain polymerisation.
11. The thermo setting resins have three dimensional network structures.
a) True
b) False
View Answer
Answer: a
Explanation: The thermo setting resins have three dimensional network
structures. The thermo plastics consists of long chain linear polymers.
12. Thermo setting resins are __________
a) Soft
b) Hard
c) Weak
d) Less brittle
View Answer
Answer: b
Explanation: Thermo setting resins are hard. They are strong in nature and they
are more brittle.

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13. The thermo plastics resins are usually soluble in _________
a) Organic solvents
b) Only in some organic solvents
c) Polar solvents
d) Only in water
View Answer
Answer: a
Explanation: The thermo plastics resins are usually soluble in organic solvents.
The thermo setting resins are insoluble in organic solvents.
14. Which of the following is a thermo setting resins?
a) Polyethylene
b) Polyvinyl chloride
c) Polyvinyl cyanide
d) Bakelite
View Answer
Answer: d
Explanation: The Bakelite comes under the thermo setting resins. The
polyethene and poly vinyl chloride comes under the thermo plastic resins.
15. In thermo plastic resins the force of attraction can be break easily by
____________
a) Heat
b) Pressure
c) Both heat and pressure
d) Neither heat nor pressure
View Answer
Answer: c
Explanation: In thermo plastic resins the force of attraction can be break easily
by both the heat and pressure. These can be reshaped but the thermo setting
resins cannot be reshaped.
Applied Chemistry Questions and Answers – Compounding of Plastics – 1
focuses on “Compounding of Plastics – 1”.
1. Usually the polymer resin is mixed with four to ten ingredients during
the fabrication to impart useful properties to the finished articles. This is

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called mix.
a) True
b) False
View Answer
Answer: a
Explanation: Usually the polymer resin is mixed with four to ten ingredients
during the fabrication to impart useful properties to the finished articles. This is
called mix. They are must and should to get good plastic.
2. __________ acts as a binder in plastics.
a) Resins
b) Plasticizers
c) Lubricant
d) Accelerators
View Answer
Answer: a
Explanation: Resins acts as the binders in plastic which holds the different
constituents together. The product of polymerisation is called resins.
3. ___________ increases the flexibility of the polymer.
a) Resins
b) Catalysts
c) Lubricants
d) Plasticizers
View Answer
Answer: d
Explanation: Plasticizers are used to increase the flexibility of the polymer. It is
also used to the increase of plasticity of the polymer.
4. Plasticizers are used to get the ___________ between the polymeric
molecules.
a) Attraction
b) Freedom of movement
c) Pi-bond
d) Sigma bond
View Answer
Answer: b
Explanation: Plasticizers are used to get the greater freedom of movement
between the polymeric molecules. Plasticizers neutralise the intermolecular
forces of attraction between polymer chains.
5. Plasticizers ___________ the strength of the plastics.

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a) Increase
b) Decrease
c) Do not affect
d) May increase above the room temperature
View Answer
Answer: b
Explanation: Plasticizer decreases the strength of the plastics. They also
decrease the chemical resistance of the plasticizers.
6. __________ makes the polymers impermeable to x-rays.
a) Strontium salts
b) Ammonium salts
c) Calcium salts
d) Barium salts
View Answer
Answer: d
Explanation: The barium salts makes the polymers impermeable to x-rays and
asbestos provides heat and corrosion resistance to polymers.
7. The percentage of the fillers is up to ___________ total moulding mixture.
a) 20%
b) 30%
c) 40%
d) 50%
View Answer
Answer: d
Explanation: The percentage of the fillers is up to the 50% of the total moulding
mixture of the plastics. They reduce the cost of the polymers.
8. Which of the following are used as the fillers?
a) Vegetable oils
b) Camphor
c) Ester of stearic acids
d) Wood flour
View Answer
Answer: d
Explanation: Vegetable oils, camphor and ester of stearic acids are used as the
plasticizers. The wood flour, ZnO, PbO are used as the fillers.
9. __________ prevent moulded article from sticking to the fabrication
equipment.
a) Catalyst

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b) Fillers
c) Lubricants
d) Stabilizers
View Answer
Answer: c
Explanation: Lubricants prevent moulded article from sticking to the fabrication
equipment. They impart flawless and glossy finish to the products.
10. Lubricants are used to prevent the moulded article from _________
a) Rusting
b) Sticking
c) Not sticking
d) Burning
View Answer
Answer: b
Explanation: Lubricants are used to prevent the moulded article from sticking to
the fabrication equipment. Lubricants make the moulding plastics easier.
11. Which of the following are not used lubricants?
a) Oils
b) Waxes
c) Oleates
d) Salts
View Answer
Answer: d
Explanation: The most commonly used lubricants are oils, waxes, oleates,
stereates and soaps. The salts are not used as lubricants.
12. ___________ is used to improve the thermal stability during
polymerisation.
a) Accelerators
b) Colouring materials
c) Stabilizers
d) Lubricants
View Answer
Answer: c
Explanation: Stabilizers are used to improve the thermal stability during
polymerisation. Accelerators are used to increase the polymerisation of fusion
resin during modulation operation into linked infusible form.
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13. Which of the following is a stabilizer?
a) White lead
b) PbO
c) ZnO
d) Metallic oxides
View Answer
Answer: a
Explanation: The PbO, ZnO and metallic oxides are used as the fillers. ZnO and
metal oxides are also used as the accelerators. The stabilizers are white lead,
lead chromate, red lead.
14. Compression moulding is applicable to ___________
a) Thermoplastic resins
b) Thermo setting resins
c) Both thermo plastic and thermo setting resins
d) Neither thermo plastics nor thermo setting resins
View Answer
Answer: c
Explanation: Compression moulding is applied to both the thermo plastics and
thermo setting resins. It is the one of the method of fabrication.
15. How many types of fabrication methods are there?
a) 4
b) 5
c) 6
d) 7
View Answer
Answer: d
Explanation: There are seven types of fabrication methods are there. They are
compression moulding, injection moulding, transfer moulding, extrusion
moulding, bubble moulding, casting and thermoforming.
Applied Chemistry Questions and Answers – Compounding of Plastics – 2
This set of Applied Chemistry Question Bank focuses on “Compounding of
Plastics – 2”.
1. In compression moulding, the cavity is filled with ________ plastic.
a) Solid
b) Liquid
c) Gaseous
d) May be solid or liquid

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View Answer
Answer: b
Explanation: The top and bottom moulds are capable of moving relatively. When
heat and pressure is applied according to the specification, the fluidized plastic
is filled in the cavity.
2. Curing means the time given to the polymer for setting.
a) True
b) False
View Answer
Answer: a
Explanation: Curing means the time given to the polymer for setting in the
mould. It is done either by heating in case of thermo plastic resins.
3. The cost of production for the injection moulding is ___________
a) High
b) Low
c) Moderate
d) Very high
View Answer
Answer: b
Explanation: Th cost of the production for the injection moulding is low. It has
high speed production. Loss of the materials will be less.
4. Which of the following is the part of the injection moulding device?
a) Regulator
b) Guide pins
c) Top mould
d) Bottom mould
View Answer
Answer: d
Explanation: The regulator I used in the injection moulding device. The guide
pins, top mould and bottom moulds are used in the compressing moulding of
plastics.
5. In transfer moulding the powdered compounded plastic is in the
chamber which is applied __________ temperature and ________
pressure.
a) High, low
b) Low, high
c) Minimum, high
d) Maximum, high

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View Answer
Answer: c
Explanation: In transfer moulding the powdered compounded plastic is in the
chamber which is applied minimum temperature and high pressure.
6. The soft and semi solid plastic is injected into mould by _________
a) Orifice
b) Nozzle
c) Hinge
d) Plunger
View Answer
Answer: d
Explanation: Plunger is used to inject the soft and semi solid plastic to work at
high pressure due to the high friction at nozzle.
7. Very delicate and intricate shapes can be produced in transfer moulding
due to ___________
a) Plasticized mix flows very fast into mould
b) Plasticized mix flows very slow into the mould
c) High pressure
d) Minimum temperature
View Answer
Answer: b
Explanation: Very delicate and intricate shapes can be produced in transfer
moulding due to plasticized mix flows very slow into the mould. The mould is
heating up to the curing temperature and allowed to set.
8. A hot, softened thermo plastic tube is called as _____________
a) Extruded tube
b) Hopper
c) Die
d) Parison
View Answer
Answer: d
Explanation: A hot, softened thermo plastic tube is called parison is placed
inside a two piece hollow tube in the mould. It is used in the blowing technique.
9. The article in the transfer moulding are __________
a) Cured very fast
b) Cured incompletely
c) Cured uniformly
d) Cured moderately

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View Answer
Answer: c
Explanation: The article in the transfer moulding are cured uniformly. They are
cured slowly and completely. The articles are free from flow marks and thick
pieces.
10. Extrusion moulding is for __________
a) Thermo plastic resins
b) Thermo setting resins
c) Both thermo plastic and thermo setting resins
d) Neither thermo plastic nor thermo setting resins
View Answer
Answer: a
Explanation: Extrusion moulding is the method that is applied to the thermo
plastic resins to make articles of uniform cross section like tubes, rods, sheets
etc.
11. Blowing otherwise called as _________
a) Air blow technique
b) Bubbling
c) Bubble casting
d) Bubble blowing
View Answer
Answer: c
Explanation: Blowing otherwise called as the bubble casting. It is used for the
fabricating hollow plastic articles like soft drink bottles etc.
12. Thermo forming technique is used for fabricating __________
a) Hollow plastic articles
b) Plastic tubes
c) Plastic wires
d) Three dimensional articles
View Answer
Answer: d
Explanation: Thermo forming technique is used for fabricating the three
dimensional articles. The tubes and wires are fabricated by the extrusion
moulding and hollow plastic articles by thermo forming.
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13. Thermo forming method is a combination of __________ and
__________

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a) Blowing, extrusion moulding
b) Blowing, compression moulding
c) Extrusion moulding, compression moulding
d) Transfer moulding, blowing
View Answer
Answer: c
Explanation: The thermoforming method is a combination of the extrusion
moulding and compression moulding.
14. Blistering is almost eliminated in the __________
a) Transfer moulding
b) Blowing
c) Extrusion moulding
d) Injection moulding
View Answer
Answer: a
Explanation: Blistering is almost eliminated in the transfer moulding. It is one of
the advantages of the transfer moulding.
15. Which of the following is not the part of the transfer moulding device?
a) Hinge
b) Plunger
c) Orifice
d) Spreader
View Answer
Answer: d
Explanation: The hinge, plunger and orifice are present in the transfer moulding.
The soft plastic is injected by plunger, ejected from orifice and spreader is
present in the injection moulding.
Applied Chemistry Questions and Answers – Preparation, Properties and
Applications of Some Compounds – 1
focuses on “Preparation, Properties and Applications of some Compounds – 1”.
1. Which of the following is the incorrect equation?

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View Answer
Answer: d
Explanation: Ethylene gas in presence of benzoyl peroxide produces the LDPE
not HDPE. Here, LDPE is the low density polyethylene. LDPE is produced at
1500 atmosphere pressure.
2. Polyethylene is a ___________
a) Bad conductor
b) Transparent
c) Polar material
d) High symmetrical structure
View Answer
Answer: d
Explanation: Polyethylene is a rigid, waxy white, translucent, non-polar material,
with high symmetrical structure. It is a good electrical insulator.
3. Which of the following is attacks the polyethylene?
a) Kerosene
b) Strong acids
c) Alkalis
d) Salt solutions
View Answer
Answer: a
Explanation: The polyethylene is resistant to the strong acids, alkalis and salt
solutions. It is attacked by the oils and organic solvents. It is also resistant to the
oxygen, carbondioxide.
4. The low density polyethylene has the melting point.
a) 840C
b) 85C
c) 860C
d) 870C
View Answer
Answer: d
Explanation: The low density polyethylene possess branched chain structure

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and its melting point is about the 870C.
5. Poly vinyl chloride is produced by the free radical chain polymerisation
of the vinyl chloride in presence of the benzoyl peroxide.
a) True
b) False
View Answer
Answer: a
Explanation: Poly vinyl chloride is produced by the free radical chain
polymerisation of the vinyl chloride in presence of the benzoyl peroxide. The
hydrogen peroxide can also be used as the catalyst instead of the benzoyl
peroxide.
6. Poly vinyl chloride is a __________
a) Blue coloured compound
b) Inflammable
c) Weak
d) Brittle
View Answer
Answer: d
Explanation: Poly vinyl chloride is a colourless, non-inflammable and chemically
inert in nature. It is strong and brittle.
7. Plasticized poly vinyl chloride can be used for _________
a) High frequency insulator parts
b) Bottle caps
c) Coated wires
d) Electrical insulation
View Answer
Answer: d
Explanation: Plasticized poly vinyl chloride can be used for electrical insulation,
injection moulding articles like tool handles, radio and telephone components.
8. Phenol is made to react with formaldehyde in presence of acid or alkali
produces ________
a) Phenol
b) Poly vinyl chloride
c) Plasticized poly vinyl chloride
d) Polyethylene
View Answer
Answer: a
Explanation: Phenol is made to react with formaldehyde in presence of acid or

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alkali produces di, tri and mono phenols depending on the phenol formaldehyde
ratio.
9. Bakelite is __________
a) Good anion exchanging resin
b) Attacked by acids
c) Attacked by salts
d) Resistant to alkalis
View Answer
Answer: a
Explanation: Bakelite is a good anionic exchanging resin. It is a good adhesive
and it is resistant to acids and salts. It is attacked by the alkalis.
10. Glass laminates can be made by using ___________
a) Poly vinyl chloride
b) Bakelite
c) Polyethylene
d) Phenol
View Answer
Answer: b
Explanation: Glass laminates can be made by using Bakelite. Bakelite is also
called as the phenol-formaldehyde resin.
11. Bakelite is not _______
a) Hard
b) Strong
c) Rigid
d) Weak
View Answer
Answer: d
Explanation: Bakelite is not weak. It is hard, strong and rigid. It is an excellent
electrical insulator. It is scratch resistant and water resistant.
12. The bearings used in the propeller shafts are prepared using ________
a) Phenol-formaldehyde resin
b) TEFLON
c) Vinyl cyanide
d) Vinyl iso cyanide
View Answer
Answer: a
Explanation: The bearings used in the propeller shafts are made by using
Phenol-formaldehyde resin. It is also used in the paper industry and rolling mills.

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13. TEFLON is obtained by the chain polymerisation of tetra fluoro
ethylene in presence of __________ as initiator.
a) Hydrogen peroxide
b) Hydrogen nitrate
c) Hydrogen
d) Benzoyl peroxide
View Answer
Answer: d
Explanation: TEFLON is obtained by the chain polymerisation of the tetra fluoro
ethylene in presence of the benzoyl peroxide as an initiator.
14. TEFLON has _________
a) High melting point
b) Low melting point
c) Low density
d) Good conduction of electricity
View Answer
Answer: a
Explanation: TEFLON has the high melting point, high density and it is the bad
conductor of electricity as it is an insulator.
15. TEFLON is used to make chemical carry pipes due to its __________
a) extreme chemical resistance
b) Resistance towards alkalis
c) Resistance towards strong acids
d) Resistance towards salts
View Answer
Answer: a
Explanation: TEFLON is used to make chemical carry pipes due to its extreme
chemical resistance. It is used for making the gaskets, pump parts, tank linings
and tubing.
Applied Chemistry Questions and Answers – Preparation, Properties and
Applications of Some Compounds – 2
This set of Applied Chemistry Questions and Answers for Entrance exams
focuses on “Preparation, Properties and Applications of some Compounds – 2”.
1. Poly carbonates are the durable materials with _________

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a) Low impact resistances
b) High scratch resistance
c) Low scratch resistance
d) Low transparency
View Answer
Answer: c
Explanation: Poly carbonates are the durable materials with the high impact
resistances, low scratch resistances and high transparency.
2. Poly carbonates possess glass transition temperature of __________
a) 144oC
b) 145oC
c) 146oC
d) 147oC
View Answer
Answer: d
Explanation: Poly carbonates has the transition temperature of 147oC. Poly
carbonates are transparent and good electrical insulators.
3. _________ are used in the data storage.
a) Bakelite
b) TEFLON
c) Poly carbonates
d) Polyethylene
View Answer
Answer: c
Explanation: Poly carbonates are used in the data storage. They are used in the
production of compact discs and bluray discs as well as DVD’s.
4. Poly carbonates are used as ________ in the high stability capacitors.
a) Accelerator
b) Inhibitor
c) Dielectric
d) Initiator
View Answer
Answer: c
Explanation: Poly carbonates are used as the dielectric in the high stability
capacitors. Poly carbonates are used in the construction materials.
5. Polyurethanes are in the class of compounds __________
a) Reaction polymers
b) Chain polymers

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c) Branched polymers
d) Linear polymers
View Answer
Answer: a
Explanation: Polyurethanes are in the class of compounds called reaction
polymers which include in epoxies, polyesters and phenolics.
6. Polyurethanes possess __________
a) No impact resistance
b) Softness
c) Hardness
d) No tear resistance
View Answer
Answer: c
The polyurethanes possess the impact resistance, tensile strength, hardness,
abrasion and tear resistance.
7. The chair, house and car are some of the applications of the __________
a) Bakelite
b) TEFLON
c) Polyurethane
d) Poly vinyl chloride
View Answer
Answer: c
Explanation: The chair, house and car are some of the applications of the
polyurethane. It has many applications in the daily life also.
8. Polyurethanes are _________
a) Good conductors
b) Good insulators
c) Having no tensile strength
d) Affected by heat
View Answer
Answer: b
Explanation: Polyurethanes are having the good insulating properties. They are
having tensile strength and they are resistant to environment conditions like
heat, moisture etc.
9. Polyurethanes are used for purifying the ________
a) Water
b) Alcohol
c) Acids

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d) Salt solutions
View Answer
Answer: a
Explanation: Polyurethanes are used for purifying the water. They are used in
refrigeration and freezers also.
10. Sun glasses, computer cases and printing substrate can be done by
using _________
a) Polyurethanes
b) Poly carbonates
c) Poly vinyl cyanide
d) Polyethylene
View Answer
Answer: b
Explanation: Sun glasses, computer cases and printing substrate can be done
by using poly carbonates. Theft proplastic packaging which cannot be opened
by hand are also made from poly carbonates.
Applied Chemistry Questions and Answers – Natural Rubber
focuses on “Natural Rubber”.
1. The polymers which possess the property of elastic is called rubber.
a) True
b) False
View Answer
Answer: a
Explanation: The polymers which possess the property of elastic is called the
rubber. Temporary deformation takes place.
2. The temporary deformation of rubber take place after applying the
_______ stress.
a) 600e.u
b) More than 600e.u
c) 500e.u
d) more than 500e.u
View Answer
Answer: b
Explanation: The temporary deformation of the rubber takes place after applying

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the stress around more than 600e.u. when the stress is applied the chains get
partially aligns with respect to the other.
3. The elasticity of the rubber is due to its ___________
a) Trigonal planar
b) Octahedral
c) Pentagonal bipyramidal
d) Helix
View Answer
Answer: d
Explanation: The elasticity of the rubber is due to its helical structure. On
releasing the stress, the chains get reverted back to their original coiled state.
4. Isoprene in natural rubber exists in ___________ geometrical isomeric
forms.
a) 2
b) 3
c) 4
d) 5
View Answer
Answer: a
Explanation: Isoprene in natural rubber exists in two geometrical isomeric forms.
They are cis-isoprene and trans-isoprene.
5. Cis-poly isoprene is present in ________
a) Hevea rubber
b) Guayule rubber
c) Percha rubber
d) Gutta rubber
View Answer
Answer: a
Explanation: Cis-poly isoprene is present in the Hevea rubber and the trans-poly
isoprene is present in guayule rubber and percha rubber.
6. The latex is diluted to _________ and filtered to remove suspended
impurities.
a) 5-10%
b) 10-15%
c) 15-20%
d) 20-25%
View Answer
Answer: c

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Explanation: The latex is diluted to 15-20% and filtered to remove suspended
impurities like pieces of bark, leaves etc.
7. The filtered latex is sent into the tanks and treated with __________
a) Acetic acid
b) Formaldehyde
c) Acetaldehyde
d) Poly isoprene
View Answer
Answer: a
Explanation: The filtered latex is sent into the tanks and treated with the acetic
acid. Instead of acetic acid, sometimes we can also use the formic acid.
8. The rubber coagulates into soft _________ colour mass.
a) Yellow
b) Light yellow
c) White
d) Light pink
View Answer
Answer: c
Explanation: The rubber coagulates into soft white colour mass which is called
as coagulam and then filtered and washed with water.
9. While producing the crepe rubber, the coagulam is passed between two
rollers of about _________ wide.
a) 3mm
b) 4mm
c) 50cm
d) 100cm
View Answer
Answer: c
Explanation: The coagulam is passed in between the two rollers of about 3mm
apart and 50cm wide and extruded in the form of a sheet which resemble the
crepe paper, which possess rough surface.
10. While producing the smoked rubber, the filtered latex is fed into long
rectangular tanks of _________ deep.
a) 1m
b) 2m
c) 50cm
d) 30cm
View Answer

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Answer: d
Explanation: In one type of processing the filtered latex is fed into long
rectangular tanks of 30cm deep and 1m wide.
11. While producing smoked rubber, the latex and reacted with formic
acid, the vertical partition plates are inserted and left undisturbed for
_________
a) 13 hours
b) 14 hours
c) 15 hours
d) 16 hours
View Answer
Answer: d
Explanation: After introducing the latex and reacted with formic acid, the vertical
partition plates are inserted and left undisturbed for 16 hours.
12. While producing the smoked rubber, the sheets are hanged for about
_________ in smoked chambers.
a) 1day
b) 2 days
c) 3 days
d) 4 days
View Answer
Answer: d
Explanation: While producing the smoked rubber, the sheets are hanged for
about 4 days in smoked chambers. The final roller gives ribbed pattern to rubber
sheet.
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13. To produce the smoked rubber, the rubber sheets are hanged in
smoked chambers at __________
a) 10-20o
C
b) 20-30o
C
c) 30-40o
C
d) 40-50o
C
View Answer
Answer: d
Explanation: To produce the smoked rubber, the rubber sheets are hanged in
smoked chambers at 40-50o
C for four days.
14. Solvent extraction process is used to extract __________
a) Crepe rubber

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b) Smoked rubber
c) Gutta percha
d) Guayule rubber
View Answer
Answer: c
Explanation: Solvent extraction process is the method of extracting the gutta
percha. It is extracted from the matured leaves of the palagum gutta and
dichopsis gutta.
15. In solvent extraction process, the mature leaves are grounded and heated
about _________
a) 40o
C
b) 50o
C
c) 60o
C
d) 70o
C
View Answer
Answer: d
Explanation: In solvent extraction process, the mature leaves are grounded and
heated about 70oC. It is heated along with water.
Applied Chemistry Questions and Answers – Synthetic Rubber
focuses on “Synthetic Rubber”.
1. BUNA – S is otherwise called as __________
a) Sodium rubber
b) Synthesized rubber
c) Butadiene rubber
d) Styrene rubber
View Answer
Answer: d
Explanation: BUNA – S is otherwise called as styrene rubber. It is also called as
the government rubber styrene.
2. Ameripol is nothing but _________
a) BUNA – N
b) BUNA – S
c) Dacron
d) Teflon
View Answer

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Answer: b
Explanation: Ameripol is nothing but BUNA – S. BUNA – S stands for the
composition of the monomers and catalyst.
3. In BUNA – S, the BU stands for ________
a) Butadiene
b) Butane
c) Butaraldehyde
d) 3-Butanoic acid
View Answer
Answer: a
Explanation: In BUNA – S, the BU stands for Butadiene. The butadiene acts as
the monomer. NA acts as catalyst that is sodium and S for styrene acts as
monomer.
4. Styrene rubber is a _________
a) Strong
b) Weak
c) Neither strong nor weak
d) Very weak
View Answer
Answer: a
Explanation: Styrene rubber is strong and tough polymer. Styrene is from
benzene and ethylene in presence of anhydrous aluminium chloride as catalyst.
5. Styrene rubber is vulcanised by ___________
a) Sulphurous oxide
b) Sulphur mono chloride
c) Sulphur-di-oxide
d) Carbon
View Answer
Answer: b
Explanation: Styrene rubber is vulcanised by sulphur mono chloride or sulphur.
It resembles natural rubber in processing characteristics and quality of finished
products.
6. BUNA- S is a __________
a) Electrical insulator
b) Electrical conductor
c) Semi conductor
d) Conducts only at certain temperature
View Answer

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Answer: a
Explanation: BUNA – S is a good electrical insulator. Butadiene is produced
from the acetaldehyde and ethyl alcohol.
7. The BUNA – S is _________ chemicals.
a) Attacked by
b) Resistant to
c) Neither resistant nor attacked
d) Neutral
View Answer
Answer: b
Explanation: The BUNA – S is resistant to the chemicals and it is swelled by the
oils and attacked by the traces of ozone present in atmosphere.
8. Manufacture of tyres can be done by __________
a) BUNA – N
b) Thiokol rubber
c) Poly sulphide rubber
d) BUNA – S
View Answer
Answer: d
Explanation: Manufacture of tyres can be done by the BUNA – S . It is used in
the foot ware industry for making shoe soles and foot ware components.
9. Which of the following can be made by the BUNA – S?
a) Cable insulations
b) Coats
c) Water proof clothes
d) Cosmetics
View Answer
Answer: a
Explanation: The cable insulations and the wires can be made by the BUNA -S.
Floor files, tank linings in chemical industries and as an adhesive.
10. Which of the following rubber cannot be vulcanised?
a) BUNA – S
b) BUNA – N
c) Thiokol rubber
d) Teflon
View Answer
Answer: c
Explanation: The Thiokol rubber is also called as the poly sulphide rubber. The

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Thiokol rubber cannot be vulcanised and it cannot form hard rubber.
11. The poly sulphide rubber is resistant to __________
a) Ozone
b) Oils
c) Chemicals
d) Nitrogen
View Answer
Answer: a
Explanation: The poly sulphide rubber is resistant to the ozone. It is also
resistance to the mineral oils, fuels, solvents, oxygen and sunlight.
12. The gaskets can be made by __________
a) Gutta-percha
b) Nitrile rubber
c) Thiokol rubber
d) BUNA – S
View Answer
Answer: c
Explanation: The gaskets can be made by the thiokol rubber. It is made seals for
printing rolls. They are also used for lining houses for conveying gasoline.
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13. BUNA – N is a co-polymer of ___________ and __________
a) Butadiene, acrylonitrile
b) Sodium poly sulphide, ethylene dichloride
c) Benzene, ethylene
d) Acetaldehyde, ethyl alcohol
View Answer
Answer: a
Explanation: BUNA – N is a co-polymer of the acrylonitrile and butadiene.
Thiokol is the co-polymer of the sodium poly sulphide and ethylene dichloride.
Styrene is the co-polymer of the benzene and ethylene.
14. BUNA – N can be vulcanised by __________
a) Sulphur
b) Oxygen
c) Sulphur dioxide
d) Sulphurous acid
View Answer
Answer: a

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Explanation: BUNA – N can be vulcanised by the sulphur. BU stands for the
butadiene and NA stands for sodium and N stands for acrylonitrile.
15. Vulcanized BUNA – N is resistant to _________
a) High temperatures
b) Low temperature
c) Oils
d) Acids
View Answer
Answer: a
Explanation: Vulcanised BUNA – N is resistant to the high temperatures. The
normal BUNA – N is resistant to the acids, salts, heat and oils.
Applied Chemistry Questions and Answers – Applications of Elastromers
focuses on “Applications of Elastromers”.
1. Conveyor belts are made by _______
a) BUNA – S
b) BUNA – N
c) Thiokol
d) Teflon
View Answer
Answer: b
Explanation: Conveyor belts are made by the BUNA – N. Vulcanised BUNA – N
is resistant to the high temperature and ageing.
2. BUNA – N is used in the auto mobiles because of its _______
a) Heavy weight
b) Light weight
c) Easy production
d) Less cost of production
View Answer
Answer: b
Explanation: BUNA – N is used in auto mobile industries. It is used to make the
auto mobile parts because the BUNA – N is the strong polymer and has the light
weight.
3. __________ are used in the air crafts.
a) Fibre rein forced plastics
b) BUNA- S

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c) BUNA- N
d) Thiokol
View Answer
Answer: a
Explanation: The fibre rein forced plastics is used in the air crafts. They can be
prepared in six types. Matched metal die moulding, injection moulding, hand lay
up and continuous lamination are some of them.
4. The fibre rein forced plastics has ____________ cost of production.
a) High
b) Low
c) Moderate
d) Very high
View Answer
Answer: b
Explanation: The fibre rein forced plastics has the low cost of production. It has
the high dimensional stability. Low efficient of thermal expansion.
5. Which of the following is the example of the polysaccharides?
a) Gelatin
b) Casein
c) Silk
d) Cellulose
View Answer
Answer: d
Explanation: Cellulose comes under the polysaccharides. Other examples of the
polysaccharides are Starch. Gelatin, casein and silk are the examples of the
proteins.
6. The crystallinity in Polyhydroxy alkanoates is lie in the range
of__________
a) 40%
b) 50%
c) 60%
d) 70%
View Answer
Answer: d
Explanation: The crystallinity in polyhydroxy alkanoates is in the range of the
70%. Polyhydroxy alkanoates polymers are thermoplastics.
7. The glass transition temperature of poly lactic acid is __________
a) 20-30oC

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b) 50-55oC
c) 60-65oC
d) 30-40oC
View Answer
Answer: c
Explanation: The glass transition temperature of poly lactic acid is 60-65oC. It
possess the melting point of 173-178oC.
8. Which of the following is made by the poly lactic acid?
a) Screws
b) Staples
c) Bone plating systems
d) Tacks
View Answer
Answer: a
Explanation: The screws can be made by the poly lactic acid. The staples, bone
plating and tacks are made by the polyhydroxy alkanoates.
9. Catering is done by the ________
a) MATER BI
b) Teflon
c) Dacron
d) Poly lactic acid
View Answer
Answer: a
Explanation: Catering is done by the MATTER BI. It is very strong. Catering
means the making of things like cutlery, plates, cups etc.
10. Poly vinyl acetate is soluble in the water.
a) True
b) False
View Answer
Answer: a
Explanation: Poly vinyl acetate is soluble in the water. It belongs to the class of
the vinyl polymers.
11. Poly vinyl acetate is used in _________
a) Agriculture
b) Food industry
c) Catering
d) Waste management
View Answer

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Answer: b
Explanation: Poly vinyl acetate is used in the food industry. The matter bi is
used in the agriculture, catering and also in the waste management.
12. For making compostable packing material _______ is used.
a) Poly lactic acid
b) Polyhydroxy alkanoates
c) Dacron
d) Teflon
View Answer
Answer: a
Explanation: The poly lactic acid is used to prepare the compostable packing
material and disposable garments etc.
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13. Diaper are made by __________
a) Polyhydroxy alkanoates
b) Poly lactic acid
c) Polyesters
d) Proteins
View Answer
Answer: b
Explanation: Poly lactic acids are used to make the diapers, anchors, screws,
pins, mesh, disposable garments etc.
14. The conductivity of the conducting polymers increases with
__________
a) Increase in temperature
b) Decrease in temperature
c) Independent of temperature
d) Independent of temperature at some conditions
View Answer
Answer: a
Explanation: The conductivity of the conducting polymers increases with
increase in temperature. It is temperature dependent.
15. ____________ are used for the electron beam lithography.
a) Poly lactic acid
c) Polyesters
d) Conducting polymers

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View Answer
Answer: d
Explanation: Conducting polymers are used for the electron beam lithography.
The conductivity of them increases with increase in the chain length or
conjugation.
Applied Chemistry Questions and Answers – Applications of Elastromers
focuses on “Applications of Elastromers”.
1. Conveyor belts are made by _______
a) BUNA – S
b) BUNA – N
c) Thiokol
d) Teflon
View Answer
Answer: b
Explanation: Conveyor belts are made by the BUNA – N. Vulcanised BUNA – N
is resistant to the high temperature and ageing.
2. BUNA – N is used in the auto mobiles because of its _______
a) Heavy weight
b) Light weight
c) Easy production
d) Less cost of production
View Answer
Answer: b
Explanation: BUNA – N is used in auto mobile industries. It is used to make the
auto mobile parts because the BUNA – N is the strong polymer and has the light
weight.
3. __________ are used in the air crafts.
a) Fibre rein forced plastics
b) BUNA- S
c) BUNA- N
d) Thiokol
View Answer
Answer: a
Explanation: The fibre rein forced plastics is used in the air crafts. They can be

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prepared in six types. Matched metal die moulding, injection moulding, hand lay
up and continuous lamination are some of them.
4. The fibre rein forced plastics has ____________ cost of production.
a) High
b) Low
c) Moderate
d) Very high
View Answer
Answer: b
Explanation: The fibre rein forced plastics has the low cost of production. It has
the high dimensional stability. Low efficient of thermal expansion.
5. Which of the following is the example of the polysaccharides?
a) Gelatin
b) Casein
c) Silk
d) Cellulose
View Answer
Answer: d
Explanation: Cellulose comes under the polysaccharides. Other examples of the
polysaccharides are Starch. Gelatin, casein and silk are the examples of the
proteins.
6. The crystallinity in Polyhydroxy alkanoates is lie in the range
of__________
a) 40%
b) 50%
c) 60%
d) 70%
View Answer
Answer: d
Explanation: The crystallinity in polyhydroxy alkanoates is in the range of the
70%. Polyhydroxy alkanoates polymers are thermoplastics.
7. The glass transition temperature of poly lactic acid is __________
a) 20-30o
C
b) 50-55o
C
c) 60-65o
C
d) 30-40o
C
View Answer
Answer: c

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Explanation: The glass transition temperature of poly lactic acid is 60-65o
C. It
possess the melting point of 173-178o
C.
8. Which of the following is made by the poly lactic acid?
a) Screws
b) Staples
c) Bone plating systems
d) Tacks
View Answer
Answer: a
Explanation: The screws can be made by the poly lactic acid. The staples, bone
plating and tacks are made by the polyhydroxy alkanoates.
9. Catering is done by the ________
a) MATER BI
b) Teflon
c) Dacron
d) Poly lactic acid
View Answer
Answer: a
Explanation: Catering is done by the MATTER BI. It is very strong. Catering
means the making of things like cutlery, plates, cups etc.
10. Poly vinyl acetate is soluble in the water.
a) True
b) False
View Answer
Answer: a
Explanation: Poly vinyl acetate is soluble in the water. It belongs to the class of
the vinyl polymers.
11. Poly vinyl acetate is used in _________
a) Agriculture
b) Food industry
c) Catering
d) Waste management
View Answer
Answer: b
Explanation: Poly vinyl acetate is used in the food industry. The matter bi is
used in the agriculture, catering and also in the waste management.
12. For making compostable packing material _______ is used.
a) Poly lactic acid

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c) Dacron
d) Teflon
View Answer
Answer: a
Explanation: The poly lactic acid is used to prepare the compostable packing
material and disposable garments etc.
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13. Diaper are made by __________
a) Polyhydroxy alkanoates
b) Poly lactic acid
c) Polyesters
d) Proteins
View Answer
Answer: b
Explanation: Poly lactic acids are used to make the diapers, anchors, screws,
pins, mesh, disposable garments etc.
14. The conductivity of the conducting polymers increases with
__________
a) Increase in temperature
b) Decrease in temperature
c) Independent of temperature
d) Independent of temperature at some conditions
View Answer
Answer: a
Explanation: The conductivity of the conducting polymers increases with
increase in temperature. It is temperature dependent.
15. ____________ are used for the electron beam lithography.
a) Poly lactic acid
c) Polyesters
d) Conducting polymers
View Answer
Answer: d
Explanation: Conducting polymers are used for the electron beam lithography.
The conductivity of them increases with increase in the chain length or
conjugation.

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Applied Chemistry Questions and Answers – Estimation of Hardness – 1
focuses on “Estimation of Hardness – 1”.
1. Soaps can be defined as the soap consuming capacity of the water sample.
a) True
b) False
View Answer
Answer: a
Explanation: Soaps are defined as the soap consuming capacity of the water.
Soaps are sodium salts of fatty acids like oleic acid and stearic acid.
2. The soft water contains the hardness of about ____________
a) 0-45ppm
b) 0-55ppm
c) 0-65ppm
d) 0-75ppm
View Answer
Answer: d
Explanation: The soft water contains the hardness of about 0-75ppm. The
hardness of water is mainly due to the salts of calcium and magnesium.
3. The hardness of moderately hard water is about _____________
a) 75-150ppm
b) 75-120ppm
c) 75-130ppm
d) 75-100ppm
View Answer
Answer: a
Explanation: The hardness of CaCO3 of moderately hard water is about 75-
150ppm. The hardness of the water can be calculated from amount of calcium
and magnesium ions present in water along with bicarbonates, sulphates.
4. The very hard water has the hardness of CaCO3 is given by ___________
a) 100-200ppm
b) 100-300ppm
c) 200-300ppm
d) Above 300ppm

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View Answer
Answer: c
Explanation: The very hard water has the hardness of CaCO3 is given about
above 300ppm. The hard water is having the hardness of CaCO3 is given by
150-300ppm.
5. The pH value of the drinking water is about _________
a) 6.5-8.5
b) 5.5-6.5
c) 4.5-5.5
d) 3.5-4.5
View Answer
Answer: a
Explanation: The pH value of the drinking water is about 6.5 to 8.5. The odour of
the drinking water is unobjectionable but the drinking water is generally having
no odour.
6. The drinking water can have the magnesium limit about ____________
a) 10-150ppm
b) 20-150ppm
c) 30-150ppm
d) 40-150ppm
View Answer
Answer: c
Explanation: The drinking water can have the magnesium limit about 30-
150ppm. The calcium in the drinking water can be about 75-200ppm.
7. The chloride in drinking water range can be about ___________
a) 200-600ppm
b) 300-600ppm
c) 400-600ppm
d) 500-600ppm
View Answer
Answer: a
Explanation: The chloride in drinking water range can be about 200-600ppm.
The nitrate is about the range of 45ppm in drinking water.
8. The iron is about the range in drinking water is _________
a) 1-1.5ppm
b) 0.01-0.1ppm
c) 1-1.1ppm
d) 0.1-1ppm

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View Answer
Answer: d
Explanation: The iron is about the range in drinking water is 0.1-1.0ppm. The
magnesium is about the range of 30-150ppm in drinking water.
9. The phosphate is about the range of __________ in drinking water.
a) 5-10ppm
b) 10-15ppm
c) 15-20ppm
d) 20-25ppm
View Answer
Answer: b
Explanation: The phosphate is about the range of 10-15ppm in drinking water.
The sulphate in drinking water is about 200-400ppm.
10. The organic matter in drinking water must be about _________
a) 0.2-1.0ppm
b) 1.0-2.0ppm
c) 2.0-3.0ppm
d) 3.0-4.0ppm
View Answer
Answer: a
Explanation: The organic matter in drinking water must be about 0.2-1.0ppm.
The phosphate is also low that is about 10-15ppm.
11. In _____________ when the eater is heated then the soluble salts turns
into insoluble ones and removed by filtration.
a) Temporary hardness
b) Permanent hardness
c) Non-carbonate
d) Non-alkaline
View Answer
Answer: a
Explanation: The hardness in the temporary hard water can be removed by
heating and filtrating the insoluble salts.
12. Which of the following does not cause the permanent hardness in
water?
a) Nitrates
b) Sulphates
c) Chlorides
d) Bicarbonates

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View Answer
Answer: d
Explanation: The bicarbonates of the calcium and magnesium cause the
temporary hardness and the sulphides, nitrates and the chlorides cause the
permanent hardness.
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13. The total hardness can be given by _________
a) Temporary + permanent hardness
b) Temporary – permanent hardness
c) Temporary * permanent hardness
d) Temporary/permanent hardness
View Answer
Answer: a
Explanation: The sum of the temporary and permanent hardness of the water
gives the total hardness of the water.
14. Which of the following process does not remove the permanent
hardness of water?
a) Lime-soda
b) Ion exchange process
c) Zeolite process
d) Heating
View Answer
Answer: c
Explanation: Heating of the water removes the temporary hardness and the
permanent hardness is removed by the zeolite process, lime soda process and
the ion exchange method.
15. All carbonate and bicarbonates are _________
a) Alkaline
b) Acidic
c) Highly acidic
d) Neutral
View Answer
Answer: a
Explanation: All the carbonates and bicarbonates are the alkaline in nature. So,
the hardness due to them is called as carbonate hardness or alkaline hardness.
Applied Chemistry Questions and Answers – Estimation of Hardness – 2

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This set of Applied Chemistry Questions and Answers for Campus interviews
focuses on “Estimation of Hardness – 2”.
1. Estimation of hardness can be determined by ________ types.
a) 2
b) 3
c) 4
d) 5
View Answer
Answer: a
Explanation: Estimation of hardness can be determined by two types. They are,
Soap titration method and EDTA method.
2. Total hardness of water can be determined by titrating the fixed volume
of water against the standard ___________ solution.
a) Soap
b) Alkaline soap
c) Acidic soap
d) Alcoholic soap
View Answer
Answer: d
Explanation: Total hardness of water can be determined by titrating the fixed
volume of water against the standard alcoholic soap solution.
3. The end point of the titration in the soap titration method is
___________
a) Formation of lather
b) Formation of salts
c) Formation of carbonates
d) Formation of bicarbonates
View Answer
Answer: a
Explanation: The end point of the titration in the soap titration method is at
formation of lather that stands for about two minutes.
4. The sodium soap will precipitate all the hardness causing ions into their
respective __________
a) Carbonates
b) Bicarbonates
c) Stereates
d) Chlorides

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View Answer
Answer: c
Explanation: The sodium soap will precipitate all the hardness causing ions into
their respective stereates in the beginning of the soap titration method.
5. The water which form lather directly with the soap is called __________
a) Hard water
b) Soft water
c) Partially hard water
d) Very hard water
View Answer
Answer: b
Explanation: The water which forms lather directly with the soap is called soft
water. The water which forms precipitates when reacted with soap is called as
the hard water.
6. EDTA method is also called as_________
a) Complexometric titration
b) Complex titration
c) Complement titration
d) Complexion titration
View Answer
Answer: a
Explanation: EDTA method is also called as the complexometric titration. In
EDTA method is ethylene diamine tetra acetate is the compound used to
remove the hardness.
7. The indicator used in the EDTA method is___________
a) Benzene
b) Phenopthalene
c) Ethylene diamine
d) Erichrome black T
View Answer
Answer: d
Explanation: The indicator used in the EDTA method is erichrome black T. The
hardness causing ions like Ca++
and Mg++
forms the unstable complexes with
reacting the erichrome black T.
8. EDTA has the ability to form _________ with metal ions.
a) Stable complexes
b) Unstable complexes
c) Salts

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d) Acids
View Answer
Answer: a
Explanation: EDTA has the more affinity to form the stable complexes by
reacting with metal ions. The EDTA forms the stable EDTA complexes.
9. The colour of dye metal complex and dye are ___________
a) Same
b) Different
c) Same in only some cases
d) Cannot be known
View Answer
Answer: b
Explanation: The colour of dye metal complex and dye are different. EDTA
extracts the metal ions from the metal ion dye to form stable complex.
10. The change in colour is sharper at the PH of ________
a) 5
b) 10
c) 15
d) 20
View Answer
Answer: b
Explanation: The change in the colour of the ions is sharper at the PH of the 10
than that of the other ranges of the PH.
11. At pH=10, the metal dye complex has the colour________
a) Wine red
b) Blue
c) Green
d) Pink
View Answer
Answer: a
Explanation: At the PH=10, the metal dye complex ion has the colour is wine red
but the dye itself has the blue colour at the PH of 10.
12. To prepare EDTA solution, _________ grams of EDTA is dissolved in
the one litre of water.
a) 1
b) 2
c) 3
d) 4

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View Answer
Answer: d
Explanation: To prepare EDTA solution, four grams of the EDTA is dissolved in
the one litre of the water. This is the standard EDTA solution used to determine
the hardness of water.
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13. _________drops of indicator is used in the EDTA method.
a) 1 to 2 drops
b) 2 to 3 drops
c) 2 to 4 drops
d) 5 to 8 drops
View Answer
Answer: a
Explanation: 1 to 2 drops of the indicator is used in the EDTA method. 0.5gms of
the dye is dissolved into the 100ml of alcohol and the indicator of two to three
drops is added.
14. The buffer used in the EDTA solution must have the pH of___________
a) 20
b) 15
c) 10
d) 5
View Answer
Answer: c
Explanation: The buffer used in the EDTA solution must have the PH of 10.
Freshly prepared solutions are more affective to have the accurate results.
15. The standard hard water is prepared such that each ml must contain
________ mg of CaCO3.
a) 1
b) 2
c) 3
d) 4
View Answer
Answer: a
Explanation: The 1g of pure CaCO3 is dissolved in the minimum amount of
concentrated HCl diluted to 1ltr of distilled water such that it contains 1mg of
CaCO3.

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Applied Chemistry Questions and Answers – Lime Washing Soda Method
focuses on “Lime Washing Soda Method”.
1. The cost of the lime soda process is _________
a) Less
b) High
c) Very high
d) Moderate
View Answer
Answer: a
Explanation: The cost of the lime soda process is less and the operational cost
of the lime soda process is high.
2. ___________can be used for the turbid water.
a) Soap titration process
b) Zeolite process
c) Ion exchange process
d) Lime soda process
View Answer
Answer: d
Explanation: Lime soda process can be used for the turbid water. The lime soda
process removes the hardness of the water steps wise by treating with different
chemicals.
3. Hardness of the water in the lime soda process is reduced to
__________
a) 10-15ppm
b) 15-30ppm
c) 30-35ppm
d) 35-40ppm
View Answer
Answer: b
Explanation: Hardness of the water in the lime soda process is reduced to 15-
30ppm. The lime soda process involves the conversion of the soluble
complexes into the insoluble precipitates.
4. Total dissolved solids in the lime soda process is _________
a) Reduced
b) Not reduced
c) Remains same

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d) Slightly reduced
View Answer
Answer: a
Explanation: Total dissolved solids in the lime soda process is reduced. It really
works well for eliminating every complex element that cause the hardness of the
water.
5. For avoiding the reduction of the residual hardness, incomplete
precipitation and slow reaction, The reaction is carried out at __________
temperature.
a) 30-40o
C
b) 40-50o
C
c) 50-60o
C
d) 60-70o
C
View Answer
Answer: c
Explanation: For avoiding the reduction of the residual hardness, incomplete
precipitation and slow reaction, The reaction is carried out at 50-60o
C
temperature.
6. Lime soda process removes _________ from the water.
a) Minerals
b) Mineral acids
c) Mineral alkaline
d) Mineral complexes
View Answer
Answer: b
Explanation: Lime soda process removes the mineral acids from the water. The
cold soda lime, hot soda lime and continuous soda lime process are other
processes to remove the hardness.
7. Batch process is only used for removing the hardness of the water on
_________
a) Small scale
b) Large scale
c) Industrial purposes
d) Irrigation purposes
View Answer
Answer: a
Explanation: Batch process is only used for the removing the hardness of the
small scale. The Continuous soda lime process is is used for the industrial

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purposes.
8. The amount of coagulate if added in the hot lime soda process is
__________
a) High
b) Low
c) Very high
d) Very low
View Answer
Answer: d
Explanation: The amount of coagulate if added in the hot lime soda process is
very low. The chemical reaction takes place faster and precipitation takes place
faster.
9. The final hardness of the water after treating by the hot lime soda
process is about __________
a) 10-15ppm
b) 15-20ppm
c) 20-25ppm
d) 25-30ppm
View Answer
Answer: c
Explanation: The final hardness of the water after treating by the hot lime soda
process is about the 20-25ppm. In very less time the water is treated in this
method.
10. Due to heating at high temperature in the hot lime soda process
reduces the __________
a) Time for treating
b) Energy
c) Corrosion of boiler
d) Cost
View Answer
Answer: c
Explanation: Due to heating at high temperature in the hot lime soda process
reduces the corrosion of boilers. The heating is done to remove the dissolved
gases in the water.
11. Lime soda process does not involve steps.
a) True
b) False
View Answer

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Answer: b
Explanation: Lime soda process involves the steps like filtration, settling of
precipitates, coagulation and removal of sludge.
12. In hot lime soda process, the bacteria in water is reduced to the
minimum due to the _________
a) High temperature
b) Faster reactions
c) Slow reactions
d) Low temperature
View Answer
Answer: a
Explanation: In hot lime soda process the bacteria count in water is reduced to
the minimum due to the high temperatures that are applied to the water during
the process.
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13. In batch process, when the tank gets filled then it indicates that
____________
a) To stir more
b) Softening is completed
c) To add the catalyst
d) To add the lime
View Answer
Answer: b
Explanation: In batch process, when the tank gets filled then it indicates that the
softening of the water is completed. Two tanks are used for construction in
batch process.
14. Reagent used in the lime soda process is _______
a) Regenerated
b) Not regenerated
c) Regenerated depending on the hardness
d) Regenerated some times
View Answer
Answer: b
Explanation: Reagent used in the lime soda process is can not be regenerated.
The high temperatures are applied in this process.
15. In lime soda process, the change in the hardness of the water needs
________
a) Change in dose of lime

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b) Change in dose of soda
c) Change in dose of lime and soda
d) Change in dose either lime or soda
View Answer
Answer: c
Explanation: In lime soda process, the change in the hardness of the water
needs the change in the dose of the lime and soda.
Applied Chemistry Questions and Answers – Permutit’s Process
focuses on “Permutit’s Process”.
1. Zeolite process is also called as __________
a) Permutit’s process
b) Demineralization
c) Batch’s process
View Answer
Answer: a
Explanation: The zeolite process is also called as the permutit’s process. The
zeolite process is very useful to remove the hardness of water.
2. The capital cost of the zeolite process is ___________
a) Less
b) High
c) Very high
d) Very low
View Answer
Answer: c
Explanation: The capital cost of the zeolite process is very high. The operational
cost of the zeolite process is low.
3. The zeolite process is used for turbid process.
a) True
b) False
View Answer
Answer: b
Explanation: The zeolite process cannot be used for the turbid process. The

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zeolites are naturally occurring sodium aluminium silicates.
4. How many steps are involved in the zeolite process?
a) 4
b) 3
c) 2
d) 1
View Answer
Answer: d
Explanation: There are no steps involved in the zeolite process. The water
hardness will be removed in one operation in zeolite process.
5. In zeolite process, the dissolved ________ is not removed.
a) Oxygen
b) Nitrogen
c) Carbondioxide
d) Chlorine
View Answer
Answer: c
Explanation: The dissolved carbondioxide is not removed during the zeolite or
the permutit’s process. It can be removed in the lime soda process.
6. The exchange medium in the zeolite process is ___________
a) Regenerated
b) Cannot be regenerated
c) Regenerated when medium hard water is introduced
d) Regenerated when very hard water is introduced
View Answer
Answer: a
Explanation: The exchange medium in the zeolite process can be regenerated.
Reagent used in the lime soda process cannot be regenerated.
7. In zeolite process, only small amount of ________ ions can be removed.
a) Mn++
b) Fe++
c) Both Fe++
and Mn++
d) Neither Fe++
nor Mn++
View Answer
Answer: c
Explanation: In zeolite process, only small amount of the Fe++
and Mn++
are
removed. The total amount can be removed by using the lime soda process.
8. Zeolite process cannot soften _________

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a) Basic water
b) Neutral water
c) Acidic water
d) Salt water
View Answer
Answer: c
Explanation: Zeolite process cannot soften the acidic water. After the process,
the sodium salts are not useful for the boiler use.
9. The hardness of the water in the zeolite process can be treated at the
range of __________
a) 5-10ppm
b) 5-15ppm
c) 5-20ppm
d) 5-25ppm
View Answer
Answer: b
Explanation: The hardness of the water in the zeolite process can be treated at
the range of the 5-15ppm. The regenerated zeolite can be used to remove the
calcium and magnesium ions from the water.
10. __________ should be free of turbidity as they interfering in exchange
process.
a) Raw water
b) Hard water
c) Very hard water
d) Soft water
View Answer
Answer: a
Explanation: Raw water should be free of turbidity and suspended impurities as
they are interfering in the exchange process.
11. Very low hardness of __________ can be achieved in the zeolite
process.
a) 3ppm
b) 4ppm
c) 5ppm
d) Less than 5ppm
View Answer
Answer: d
Explanation: By careful monitoring it will be possible to achieve the very low

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hardness of the less than that of 5ppm can be achieved in the zeolite process.
12. Variation of hardness of raw water in zeolite process _________
a) Do not affects the exchange process
b) Affects the exchange process
c) Slightly affects the exchange process
d) Some times affects the exchange process
View Answer
Answer: a
Explanation: Variation of hardness of raw water in zeolite process do not affect
the exchange process because according to it zeolite bed changes
automatically.
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13. The zeolite process can be __________
a) Can be operated pressure
b) Cannot be operated under pressure
c) Can be operated under pressure sometimes
d) Cannot be operated under pressure sometimes
View Answer
Answer: a
Explanation: The zeolite process has the best advantage than any other
processes that it can be operated under the pressure also.
14. __________ water is not suitable for zeolite process, as it affects the
mineral.
a) Highly acidic
b) Highly alkaline
c) Highly acidic and alkaline
d) Neither highly acidic nor alkaline
View Answer
Answer: c
Explanation: The highly acidic or alkaline water is not suitable for zeolite
process, as it affects the mineral. It is one of the limitations of this process.
15. NaOH formed during zeolite process is reacts with _________ at high
temperatures causing the corrosions of boilers.
a) Iron
b) Manganese
c) Magnesium
d) Cobalt
View Answer

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Answer: a
Explanation: NaOH formed during the zeolite process reacts with the iron at high
temperature during the process that leads to the corrosion of the boilers.
Applied Chemistry Questions and Answers – Ion Exchange Process
focuses on “Ion Exchange Process”.
1. Ion exchange process is also called as ___________
a) Permutit’s process
b) Demineralization
c) Zeolite process
View Answer
Answer: b
Explanation: Ion exchange process is also called as the demineralization. The
zeolite process is otherwise called as the ion exchange process.
2. The operational cost of the ion exchange process is __________
a) High
b) Low
c) Very high
d) Very low
View Answer
Answer: b
Explanation: The capital cost of the ion exchange process is very high. The
operational cost of the ion exchange process is about low.
3. The hardness in the ion exchange process is reduced to ___________
a) 0-1ppm
b) 0-2ppm
c) 0-3ppm
d) 0-4ppm
View Answer
Answer: b
Explanation: The hardness of the ion exchange process is reduced to 0 to
2ppm. It is very effective method to reduce the hardness of the water.
4. The total __________ are removed completely in the ion exchange
process.

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a) Dissolved gases
b) Dissolved solids
c) Dissolved solvents
d) Dissolved other impurities
View Answer
Answer: b
Explanation: The total dissolved solids are removed completely in the ion
exchange process. In lime soda process, the total dissolved solids are reduced
only.
5. In ion exchange process, the iron and manganese ions are removed
from the water.
a) True
b) False
View Answer
Answer: a
Explanation: In ion exchange process, not only iron and manganese ions are
removed from the water but also all the cations are removed.
6. Water softened during __________ method will be ideal in boilers.
a) Zeolite method
b) Lime soda method
c) Demineralisation method
d) Permutit’s process
View Answer
Answer: b
Explanation: Water softened during the demineralisation method is completely
free from all the impurities and flaws. So, that the water after the softening by
this method will be ideal for boilers.
7. Ion exchange process is the clean process because it has___________
a) Sludge formation
b) No sludge formation
c) Little sludge is formed
d) Other precipitates are formed
View Answer
Answer: b
Explanation: In ion exchange process, there is no formation of sludge. So, it is
called as the clean process.
8. The regeneration of acids and alkalis in ion exchange process is
__________

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a) Cheaper
b) Costlier
c) Time taking
d) Hard process
View Answer
Answer: b
Explanation: The one of the disadvantages of the ion exchange process is the
regeneration of the acids and alkalis in ion exchange process is costlier.
9. In ion exchange process, the cation exchange resin is generated by
passing ____________
a) Acids
b) Dilute acids
c) Alkalis
d) Dilute alkalis
View Answer
Answer: b
Explanation: In ion exchange process, the cation exchange resin is generated
by passing the dilute acids. The anion exchange resin is generated by passing
alkali.
10. In case of the zeolites, ion exchange process do not function properly
because of the __________
a) Turbidity
b) Suspended matter
c) Turbidity and suspended matter
d) Neither turbidity nor suspended matter
View Answer
Answer: c
Explanation: In case of zeolites, ion exchange process do not function properly
because of the turbidity and suspended matter as they send to cover the surface
of the resin.
11. The initial equipment in the ion exchange process is ___________
a) More
b) Less
c) Very less
d) Very high
View Answer
Answer: a
Explanation: The initial equipment in the ion exchange process is more.

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Continuous supply of softened water can be made available by providing
storage facilities.
12. The residual hardness after the treatment of water is about __________
a) 1 ppm
b) Less than 1ppm
c) 2 ppm
d) Less than 2pmm
View Answer
Answer: d
Explanation: The residual hardness after the treatment of the water is about less
than 2ppm. So, they are suitable for the high pressure boilers.
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13. The continuous supply of soft water can be provided by having
____________
a) Storage facilities
b) Required amount of ppm
c) High pressure boilers
d) 1ppm
View Answer
Answer: a
Explanation: The continuous supply of soft water can be provided by having
storage facilities and also two columns of each resin.
14. The cost of the resins used in the ion exchange process is _________
a) High
b) Low
c) Moderate
d) Depends on water
View Answer
Answer: a
Explanation: The cost of the resins used in the ion exchange process is high
and the regeneration of the resins in also a costly process.
15. The mineral free water is not used in __________
a) Pharmaceuticals
b) Cosmetics
c) Explosives
d) Drinking
View Answer

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Answer: d
Explanation: In drinking water some minerals must be present. In
pharmaceuticals, cosmetics, explosives and in other manufacturing processes,
the mineral free water is used.
Applied Chemistry Questions and Answers – Types of Water Pollutants
and Effects
focuses on “Types of Water Pollutants and Effects”.
1. ___________ poisoning water in Japan is from fishes.
a) Bismuth
b) Arsenic
c) Antimony
d) Palladium
View Answer
Answer: b
Explanation: The arsenic poisoning water in Japan is from fishes where the
industrial effluent was going into the sea containing arsenic.
2. Fishes can store more quantity of ___________ in their bodies.
a) Mercury
b) Bismuth
c) Palladium
d) Chlorine
View Answer
Answer: a
Explanation: Fishes can store more quantity of mercury. They can also store
lead and arsenic in their bodies.
3. Waste water released from _________ are not the sources of bacteria.
a) Sanitaria
b) Municipalities
c) Tanning
d) Industries
View Answer
Answer: d
Explanation: Waste water released from the sanitarias, municipalities, tanning
and slaughtering plants are the sources of the bacteria.
4. Bacteria and micro organisms present in the water will cause _________

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in human and animals.
a) Indigestion
b) Intestinal tract
c) Brain tumour
d) Cancer
View Answer
Answer: b
Explanation: Bacteria and micro organisms present in the water will cause
intestinal tract. The infected individual has the intestinal discharge containing the
billions of pathogens.
5. Infectious hepatitis is caused by ___________
a) Bacteria
b) Viruses
c) Protozoa
d) Helminth
View Answer
Answer: b
Explanation: The infectious hepatitis is caused by the viruses. The viruses in
water also cause the poliomyelitis disease.
6. Amoebic dysentery is caused by ___________
a) Viruses
b) Bacteria
c) Helminth
d) Protozoa
View Answer
Answer: d
Explanation: Amoebic dysentery is caused by the protozoa present in the
drinking water. In this disease, the water content from the body is lost and the
person will become weak.
7. Bacteria in water causes ________
a) Malaria
b) Typhoid
c) Dengue
d) Chicken guinea
View Answer
Answer: b
Explanation: Bacteria in water causes the typhoid. This includes the high fever
for the person. Bacteria in water also cause the cholera.

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8. Helminth in the water causes __________
a) Hook worm
b) Amoebic dysentery
c) Cholera
d) Typhoid
View Answer
Answer: a
Explanation: Helminth in the water causes the hook worm and also the guinea
worm in the person. Amoebic dysentery is caused by the protozoa and cholera
and typhoid is caused by the bacteria in water.
9. The ____________ is an important requirement of the aquatic life.
a) Dissolved nitrogen
b) Dissolved chlorine
c) Dissolved oxygen
d) Dissolved methane
View Answer
Answer: c
Explanation: The dissolved oxygen is an important requirement of the aquatic
life. They take oxygen from the water to survive.
10. The optimum value in natural water is ________
a) 2-4ppm
b) 4-7ppm
c) 4-6ppm
d) 2-7ppm
View Answer
Answer: c
Explanation: The optimum value in natural water is about 4-6ppm. Decrease in
the quantity of the dissolved water indicates the pollution of water.
11. What is the full form of BOD?
a) Biochemical oxygen demand
b) Biological oxygen demand
c) Biometric oxygen deep water
d) Biological oxygen deep water
View Answer
Answer: a
Explanation: The BOD is the full form biochemical oxygen demand. The amount
of oxygen is taken as the measure of the quantity of organic matter is called as
the BOD.

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12. COD is the short form of the chemical oxygen demand.
a) True
b) False
View Answer
Answer: a
Explanation: COD is the short form of the chemical oxygen demand. The total
organic content present in water is determined in another parameter called
COD.
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13. The disappearance of the plants and animals is due to the _________
in water.
a) Nitrogen depletion
b) Chlorine depletion
c) Oxygen depletion
d) Ozone depletion
View Answer
Answer: c
Explanation: The disappearance of the plants and animals is due to the
depletion of the oxygen in the water. Micro organisms mainly bacteria uses the
organic matter in water as food.
14. The decomposition of the matter produces into ___________ and in
presence of____________
a) Carbondioxide and oxygen
b) Oxygen and nitrogen
c) Nitrogen and carbondioxide
d) Nitrogen and chlorine
View Answer
Answer: a
Explanation: The decomposition of the matter produces into carbondioxide and
in presence of oxygen. Oxygen is taken from the water.
15. The organic matter present in the water is of __________ types.
a) Two
b) Three
c) Four
d) Five
View Answer
Answer: a

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Explanation: The organic matter present in the water is of two types. They are
biologically oxidisable and biologically inert.
Applied Chemistry Questions and Answers – Methods of Reducing Water
Pollution
focuses on “Methods of Reducing Water Pollution”.
1. The BOD value of the domestic sewage is about__________
a) 160
b) 161
c) 166
d) 168
View Answer
Answer: c
Explanation: The BOD value of the domestic sewage is about 166ppm. Total
quantity of organic matter utilised is called as the BOD.
2. Non hazardous organic wastes from the sewage is to be separated from
the___________
a) Toxic industrial wastes
b) Bacteria
c) Helminth
d) Protozoa
View Answer
Answer: a
Explanation: Non hazardous organic wastes from the sewage is to be separated
from the toxic industrial wastes. The entry of the harmful things into water must
be prevented.
3. Domestic water treatment is carried out under __________ conditions.
a) Aerobic
b) Anaerobic
c) Cannot be known
d) Depends on the pollution level of water
View Answer
Answer: a
Explanation: Domestic water treatment is carried out in presence of the oxygen.
The oxygen is taken from the water. So, it is aerobic process.
4. The BOD value of the industrial waste must be about _________

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a) 100
b) 200
c) 300
d) 400
View Answer
Answer: b
Explanation: The BOD value of the industrial waste must be about the 200. The
BOD value of the paper industry waste is about 370.
5. The BOD value of the food industry is about ___________
a) 742
b) 743
c) 744
d) 745
View Answer
Answer: d
Explanation: The BOD value of the food industry is about the 745. This value is
higher than that of the normal limits.
6. In domestic water treatment, after the primary treatment _________ is
done.
a) Screening
b) Sedimentation
c) Aerobic process
d) Anaerobic process
View Answer
Answer: a
Explanation: In domestic water treatment, after the primary treatment of
screening is done. Later sedimentation process is done.
7. In the domestic water process, when air is sent during the active sludge,
then _________ released.
a) Oxygen
b) Carbondioxide
c) Nitrogen
d) Chlorine
View Answer
Answer: b
Explanation: When the air is sent during the active sludge, then the
carbondioxide is released in domestic water process.
8. In final step of the domestic water process, the effluent contain

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___________ BOD.
a) 10ppm
b) 15ppm
c) 20ppm
d) 25ppm
View Answer
Answer: d
Explanation: The effluent obtained in the final step of the domestic water
process contains ammonia ion and having the 25ppm.
9. Aerobic process is also called as ___________
a) Activated sludge process
b) Sludge thickening process
c) Sedimentation
d) Screening
View Answer
Answer: a
Explanation: Aerobic process is also called as the activated sludge process. The
sludge thickening, sedimentation and screening are the steps involved in the
domestic water treatment.
10. By aerobic process _________ of biodegradable water is converted
into the biomass.
a) 10%
b) 30%
c) 50%
d) 75%
View Answer
Answer: c
Explanation: By aerobic process the 50% of the biodegradable water is
converted into the biomass and the remaining 50% into carbondioxide.
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11. In anaerobic treatment the organic acid and alcohol is undergone into
___________ process.
a) Sedimentation
b) Screening
c) Catalysis
d) Fermentation
View Answer

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Answer: d
Explanation: In anaerobic treatment the organic acid and alcohol is undergone
into fermentation at 35oC and the ppm of 5 to 6.
Applied Chemistry Questions and Answers – Biological Oxidation Process
focuses on “Biological Oxidation Process”.
1. In biological oxidation process, depending on the organic load, the
oxidation takes place ___________
a) 1-4Hours
b) 4-8Hours
c) 8-16Hours
d) 16-20Hours
View Answer
Answer: b
Explanation: In biological oxidation process, depending on the organic load, the
oxidation process takes place up to 4 to 8 hours. Organic impurities are reduced
by the biological oxidation process by micro organisms.
2. All impurities are oxidised into the _________ and ___________ in the
biological oxidation process.
a) Oxygen and water
b) Carbondioxide and water
c) Nitrogen and water
d) Chlorine an water
View Answer
Answer: b
Explanation: All impurities are oxidised into the carbondioxide and water in the
biological oxidation process. The sludge formed in this process will be settled
down quickly and gives clear supernatant.
3. The water after removing of sludge in the biological oxidation process is
treated with ____________
a) Chlorine
b) Bromine
c) Fluorine
d) Iodine
View Answer
Answer: a

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Explanation: The water after removing of sludge in the biological oxidation
process is treated with the chlorine or bleaching powder to make it more safe
and let it into surface water.
4. Trickling filter method is ___________ than the activated sludge
process.
a) Fast
b) Slow
c) Very fast
d) Moderate
View Answer
Answer: b
Explanation: Trickling filter method is slow process than that of the activated
sludge process. This process is convenient and cheaper process than the
activated sludge process.
5. The depth of the rectangular circular tanks in the trickling filters method
is having the depth of ____________
a) 4m
b) 3m
c) 2m
d) 1m
View Answer
Answer: c
Explanation: The depth of the rectangular circular tanks in the trickling filters
method is having the depth of the 2 metres packed with broken stone pieces or
coal etc.
6. Periodic cleaning is used to _________
a) Increase efficiency
b) Decrease efficiency
c) Increase pressure
d) Decrease dissolved oxygen
View Answer
Answer: a
Explanation: Periodic cleaning is necessary to remove excess sludge in the
water. So, it is useful to increase the efficiency of the process.
7. In the trickling filter process, the _________ build up and they block the
passage.
a) Sludge formed
b) Dissolved impurities
c) Dissolved solids

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d) Micro organisms
View Answer
Answer: d
Explanation: The micro organism built up and they block the passage and then
the rate of flow drops considerably.
8. Dried sludge can be used as _________
a) Fertilizer
b) Pesticide
c) Reagent
d) Medicine
View Answer
Answer: a
Explanation: Dried sludge can be used as the fertilizer. It I one of the main
advantages. The sludge is de watered by the filtration in sand beds.
9. The unpleasant odour of the water is due to presence of the __________
a) Nitrogen
b) Bismuth
c) Phenols
d) Dissolved oxygen
View Answer
Answer: c
Explanation: The unpleasant odour of the water is due to the presence of the
phenols, hydrogen sulphides, chlorine and organic sulphur compounds.
10. __________ imparts peculiar odour to the water.
a) Decaying organic matter
b) Detergents
c) Phenols
d) Dissolved oxygen
View Answer
Answer: b
Explanation: The bad odour of water is due to the phenols, decaying organic
matter and phenols. The peculiar odour is due to the detergents and pesticides.
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11. Reacting the water with _________ removes the odour due to the
phenols.
a) KMnO4
b) MnO4

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c) Potassium
d) Magnesium
View Answer
Answer: a
Explanation: The chlorination of water and the reacting the water with the
potassium permanganate removes the odour of water due to phenols.
12. The treatment of water with _________ improves the taste of water.
a) Oxygen
b) Chlorine
c) KMnO4
d) Ozone
View Answer
Answer: d
Explanation: The treatment of water with the ozone improves the taste of the
water and the bed of activated carbon removes the colour.
13. How many methods of removing the radio active impurities are there?
a) 2
b) 3
c) 3
d) 4
View Answer
Answer: a
Explanation: There are two types of methods. They are: By absorbing the radio
active elements by using suitable absorbent. Allowing of such periods at which it
separates from water.
Applied Chemistry Questions and Answers – Reverse Osmosis,
Ultrafilteration, COD and BOD
This set of Applied Chemistry Assessment Questions and Answers focuses on
“Reverse Osmosis, Ultrafilteration, COD and BOD”.
1. When two solutions of the different concentration is separated by the
semi permeable membrane then the solvent flows from low to higher
concentration is called osmosis.
a) True
b) False
View Answer

Applied Chemistry Multiple Choice Questions with Answers Part 3 by Malik Xufyan

Applied Chemistry Multiple Choice Questions with Answers Part 3 by Malik Xufyan

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