This document contains a 65 question chemistry test on inorganic chemical industries. The test covers topics like sulfuric acid production, chemical fertilizers like ammonium nitrate and urea, cement production, soda ash production via the Solvay process, and caustic soda production. The questions test understanding of chemical reactions, raw materials, industrial processes, and products involved in these important industrial chemical sectors.

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PPSC CHEMISTRY CLASS
Test Session
Chapter: Inorganic Chemical Industries
Test No. 13
For more WhatsApp # 0313-7355727
Topics:
1- Sulphuric Acid
2- Chemical Fertilizers
3- Cement
4- Soda Ash
5- Caustic Soda
Sulphuric Acid
1. What is the major use of sulfuric acid?
a) Removal of rust and scale from metals.
b) Manufacturing fertilisers.
c) Manufacturing explosives.
d) As the electrolyte in car batteries.
2. Which set of conditions would promote the fastest rate for the converter reaction in
the contact process?
a) No catalyst, high pressure, low temperature.
b) Catalyst, low pressure, low temperature.
c) Catalyst, low pressure, high temperature.
d) Catalyst, high pressure, high temperature.
3. What are the basic raw materials for manufacture of sulfuric acid?
a) Sulfur and pyrites
b) Oxygen
c) Hydrogen
d) Nitrogen
4. Which promoter mentioned below is used in the contact process?
a) Iron
b) Alkali
c) Acid
d) Air
5. Which commercial product is produced by Frasch Process?
a) Sulfur
b) Ammonia
c) Nitric acid
d) Sulfuric acid
6. Which one of the following product is manufacturer by Finnish Process?
a) Elemental sulfur
b) Chlorine

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c) Pyrrhotite
d) Sour gas
7. Which component of sulfur attacks the vanadium catalyst?
a) Platinum
b) Zinc
c) Arsenic
d) Lead
8. Why roasting of FeS is done?
a) Removal of arsenic
b) Recovery of H2S
c) Immune to poisons
d) Recovery of SO2
9. A high yield is a goal of most chemical industries. Which of the following statements
concerning yield is correct?
a) The yield can be improved simply by adding a greater volume of reactants.
b) Catalysts ensure high yields in chemical reactions.
c) In many industries, increasing the temperature does not increase the yield.
d) The yield is always maximised when the rate of a reaction is very fast.
10. During the contact process, sulfur trioxide is converted to sulfuric acid in a two-step
process. Why is the sulfur trioxide not simply reacted directly with water to form
sulfuric acid?
a) In a direct reaction the product would be a mixture of sulfuric acid and hydrogen sulfide.
b) The rate of reaction is too slow to be economically feasible.
c) The reaction would require high temperatures and high pressures to obtain a satisfactory
yield.
d) The reaction is very exothermic and produces a mist of acid.
11. During the production of sulfuric acid from sulfur, the sulfur is converted to sulfur
dioxide, then to sulfur trioxide, then to oleum, then to sulfuric acid. During this process
the oxidation state of the sulfur is changing from ...
a) 0 to +4 to +6 to +12 to +6.
b) 0 to +2 to +4 to +6 to +6.
c) 0 to +4 to +6 to +0 to +0.
d) 0 to +4 to +6 to +6 to +6.
12. The second step in the production of sulfuric acid is given by the equation;
2SO2(g) + O2(g)  2SO3(g)
Which conditions would increase the yield of this reaction?
a) High temperature, high pressure.
b) Low temperature, low pressure.
c) High temperature, low pressure.
d) Low temperature, high pressure.
Chemical Fertilizers
13. Nitrogenous fertiliser is required

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a) during the early stage of growth to promote development of stem and leaves.
b) for accelerating fruit formation in later stage of growth.
c) to lessen the effect of excessive potash application.
c) none of these.
14. Catalyst used in Haber’s process for ammonia production is
a) reduced iron oxide
b) nickel
c) vanadium pentoxide
d) silica gel
15. Dehydration of ammonium carbamate (to produce urea) is a/an __________ reac-
tion.
a) reversible
b) catalytic
c) exothermic
d) endothermic
16. P2O5 content in triple superphosphate is about __________ percent.
a) 42-50
b) 15-20
c) 85-90
d) 70-75
17. Vapor phase reaction of ammonia & nitric acid to produce ammonium nitrate is
termed as the __________ process.
a) Haber’s
b) Stengel
c) Le-chatlier’s
d) Du-pont’s
18. Ammonium sulphate fertiliser is
a) the highest concentration nitrogenous fertiliser.
b) the best fertiliser for paddy.
c) a basic fertiliser.
d) a neutral fertiliser.
19. Superphosphate is manufactured by reacting phosphate rock with
a) acetic acid
b) aluminium chloride
c) sulphuric acid
d) none of these
20. Which of the following does not come under the category of ‘secondary nutrient’ for
plant growth?
a) Calcium
b) Magnesium
c) Sulphur
d) Oxygen
21. Reaction of dilute sulphuric acid with phosphate rock produces
a) phosphoric acid

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b) superphosphate
c) triple superphosphate
d) gypsum
22. Conditioners like finely divided peat are added to the fertiliser to
a) counteract burning.
b) avoid caking & hardening.
c) produce bulk.
d) increase its solubility.
23. During conversion of ammonium carbamate into urea, presence of large excess of
water
a) increases the yield of urea.
b) reduces the evaporator load by diluting the urea solution.
c) does not affect the yield of urea.
d) adversely affects the yield of urea.
24. Ammonium nitrate (a fertiliser) is coated with limestone powder to
a) increase its nitrogen content.
b) cut down its production cost.
c) avoid the risk of explosion.
d) add extra nutrient as fertiliser.
25. Action of phosphoric acid on rock phosphate produces
a) superphosphate
b) triple superphosphate
c) nitrophosphate
d) diammonium phosphate
26. Pick out the wrong statement.
a) All the nitrogenous fertilisers are not soluble in water.
b) A straight fertiliser contains only one nutrient.
c) Calcium cynamide is used as weed killer in onion fields.
d) The phosphorous nutrient makes the plant stem stronger and increases its branches.
Cement Industry
27. Which stone provides the calcareous component required for the manufacture of
cement?
a) Lime
b) Limestone
c) Marble
d) Granite
28. Shale provides argillaceous components required for cement manufacture process.
a) True
b) False
29. What is released during the production of clinker?
a) CaCO3
b) CO2

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c) Ca(OH)2
d) CO
30. What is the advantage of using precalciner?
a) Fine grained cement
b) Larger clinker size
c) Fuel efficiency
d) Sound cement
31. Which method of cement manufacturing is used.
a) dry
b) wet
c) both
d) None
32. What is the percentage of gypsum in portland cement?
a) 2-9%
b) 4-6%
c) 1-3%
d) 3-8%
33. What is the range of CaCO3 in Argillocalcareous Rocks?
a) 90%
b) 40-75%
c) 30-35%
d) 80%
34. The temperature range in a cement kiln is
a) 1000-1200*c
b) 800-1000*c
c) 1200-1500*c
d) 1200-1300*c
35. The compound first to settle in cement is?
a) tricalcium silicate
b) tetra calcium alumino ferrite
c) tricalcium aluminate
d) dicalcium silicate
36. The initial setting time of ordinary portland cement is?
a) 10 min
b) 45 min
c) 30 min
d) 60 min
37. During the manufacture of portland cement, gypsum or plaster of Paris is added to?
a) to increase the strength of cement
b) modify the color of cement
c) reduce the heat of hydration of cement
d) adjust the setting time of cement

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38. Gypsum is added in the manufacture of Portland cement.
a) while mixing the raw materials
b) during burning the in the rotary kiln
c) at the beginning of grinding the clinker
d) at the end of grinding the clinker into powder
39. The cementing property of cement is due to?
a) lime
b) silica
c) iron oxide
d) alumina
40. The final setting time of ordinary cement should not be more than?
a) 2 hours
b) 4 hours
c) 8 hours
d) 10 hours
41. Quick lime with reaction with water gives?
a) hydraulic lime
b) slaked lime
c) hydrated lime
d) poor lime
Soda Ash
42. What is currently the major use of sodium carbonate?
a) Water-softening.
b) Ink removal from paper.
c) Soap-making.
d) Glass-making.
43. Solvay process is used to make
a) potassium carbonate
b) sodium carbonate
c) NaCl
d) NaOH
44. Another name for sodium carbonate is
a) washing soda.
b) caustic soda.
c) lye.
d) soda ash.
45. The raw materials for the Solvay process include
a) Ammonia
b) brine
c) lime stone
d) all of above
46. The last step of the Solvay process is

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a) preparation of ammonical brine
b) carbonation
c) preparation of carbon dioxide and slaked lime
d) recovery of ammonia
47. In the production of soda ash by Solvay process, the by-product
is____________________?
a) CaCl2
b) NH4Cl
c) NH3
d) NaOH
48. What is the chemical formula of washing soda?
a) NaHCO3
b) Na2O
c) Na2CO3
d) Na2CO3.10H2O
49. What is the ionic equation for the softening of water using washing soda?
a) Zn2+(aq) + CO32−(aq) -----> ZnCO3(s)
b) Ba2+(aq) + CO32−(aq) -----> BaCO3(s)
c) Ca2+
(aq) + CO32−(
aq) -----> CaCO3(s)
d) Mg2+(aq) + CO32−(aq) -----> MgCO3(s)
50. What is the chemical formula of lime?
a) CaO
b) CaCl2
c) Ca(OH)2
d) CaCO3
51. What is the chemical formula of slaked lime?
a) CaCO3
b) Ca(OH)2
c) CaO
d) CaCl2
52. NH3(aq) + CO2(g) + NaCl(aq) + H2O(l) ----->NaHCO3(aq)+ NH4Cl(aq)
a) Na+ and Cl−
b) Na+ and NH4+.
c) NH4+ and Cl−.
d) Na+ and HCO3−.
Caustic Soda
53. What is another name for sodium hydroxide?
a) Caustic soda
b) Lye
c) NaOH
d) All of these
54. High concentration of NaOH is produced by _____

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a) Mebrane cell process
b) Diaphragm cell process
c) Mercury cell process
d) Chemical process
55. What are the co-products in the electrolysis of brine?
a) Chlorine and caustic soda
b) Soda ash and caustic soda
c) Soda ash and chlorine
d) Chlorine, caustic soda, and soda ash
56. Cathode used in electrolysis of brine by diaphragm cell type is _____
a) Lead
b) Iron
c) Titanium
d) Carbon
57. Which of the following is denuding reaction?
a) NaCl+H2O →NaOH+12H2+12Cl2
b) Cl– →12 Cl2 + e–
c) Na + Hg →NaHg
d) NaHg+H2O →NaOH+12 H2 + Hg
58. Major production of caustic soda is through ______
a) Mercury cell process
b) Diaphragm cell process
c) Chemical process
d) Mebrane cell process
59. Which of the following product is obtained at cathode in mercury cell process?
a) NaOH
b) NaHg
c) Cl2
d) NaCl
60. Concentration of NaOH produced in mercury cell process is _____
a) 10-12%
b) 30-33%
c) 50%
d) 70%
61. Which of the following is an advantage of mercury cell process?
a) Pure sodium hydroxide
b) Pure chlorine gas
c) Utilization of less pure brine
d) Low electrical energy consumption
62. Diaphragm used in diaphragm cell process is ______
a) Asbestos
b) Poly vinyl chloride
c) Wooden material
d) Woven fabric

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63. Membrane used in membrane cell process is ______
a) Asbestos
b) Anion- exchange membrane
c) Cation-exchange membrane
d) Woven fabric
64. Sodium hydroxide was first prepared by soap makers
a) True
b) False
65. Caustic soda use in
a) Paper industry
b) Cleaning agent
c) Water treatment
d) All of these