This document contains an unsolved chemistry exam from 1998 containing 50 multiple choice questions testing knowledge of chemistry concepts and principles. The questions cover topics including chemical compounds and reactions, periodic table properties, organic chemistry, polymers, and environmental chemistry. An answer key is provided to check solutions.

1. AMU –PAST PAPERS
CHEMISTRY- UNSOLVED PAPER - 1998

2. SECTION – I
 Single Correct Answer Type
 There are five parts in this question. Four choices are given for each part and one of them is
correct. Indicate you choice of the correct answer for each part in your answer-book by
writing the letter (a), (b), (c) or (d) whichever is appropriate

3. 01 Problem
Sodalime is
a. NaH + Na2CO3
b. NaOH + CaO
c. NaOH + NaHCO3
d. Na2CO3 + CaO

4. 02 Problem
White lead is :
a. Carbonate of lead
b. Oxide of lead
c. Basic carbonate of lead
d. Basic sulphate of lead

5. 03 Problem
AlCl3 fumes in moist air because :
a. HCl is formed in moist air
b. It is highly hygroscopic
c. It is very volatile
d. It is covalent

6. 04 Problem
Calcium is obtained by :
a. Reduction of CaCl2 with carbon
b. Roasting of limestone
c. Electrolysis of molten CaCl2
d. Electrolysis of solution of CaCl2 in water

7. 05 Problem
Brown ring test is for :
a. Nitrate
b. Sulphate
c. Halide
d. Sophie

8. 06 Problem
Sodium thiosulphate is used in photography because of its :
a. Complex forming behavior
b. Reducing behaviour
c. Reaction with light
d. Oxidizing behaviour

9. 07 Problem
A characteristic feature of transition elements is ;
a. They do not from complex ions
b. They show variable oxidation states
c. They show inert pair effect
d. They all exhibit diamagnetism

10. 08 Problem
H2O2 reduces K2Fe(CN)6 in :
a. Alkaline medium
b. Neutral solution
c. Non-polar medium
d. Acidic solution

11. 09 Problem
H2O2 oxidises H2S to :
a. H2S2O8
b. H2SO5
c. H2SO4
d. S

12. 10 Problem
Atomic radii of fluorine and neon in angstron units are respectively given by :
a. 0.72, 0.82
b. 0.72, 1.60
c. 0.72, 0.72
d. 1.60, 1.60

13. 11 Problem
Which of the following elements exhibits variable oxidation states ?
a. Zn
b. Fe
c. Al
d. Si

14. 12 Problem
Most electropositive halogen is :
a. Cl
b. Br
c. I
d. F

15. 13 Problem
Most of the man made elements occur :
a. Among the non-metals
b. Among the metalloids
c. In the actinides series
d. In the lanthanides series

16. 14 Problem
The most abundant meatl on the surface of earth is :
a. Al
b. Hg
c. Fe
d. Ca

17. 15 Problem
Cupellation process is used in the metallurgy of :
a. Ag
b. Cu
c. Fe
d. Al

18. 16 Problem
Off the following the metal the cannot be obtained by electrolysis of the
aqueous solution of their salt is :
a. Al
b. Mg
c. Cu
d. Both a and b

19. 17 Problem
Polymer of chloroethylene is :
a. Teflon
b. Nylon
c. Terylene
d. PVC

20. 18 Problem
Primary amines react with benzaldehyde to form :
a. Diazonium salts
b. Azodyes
c. Anilides
d. Schiff’s base

21. 19 Problem
Which of the following is a strong reducing agent ?
a. Methanoic acid
b. Ethanoic acid
c. Chloroacetic acid
d. Benzoic acid

22. 20 Problem
When ethylene bromide is treated with Zn, we get :
a. Alkane
b. Alkene
c. Alkyne
d. None of these

23. 21 Problem
Formaldehyde reacts with NH3 to form :
a. (CH2)6N6
b. (CH2)6N4
c. (CH2)6N5
d. (CH2)4N6

24. 22 Problem
Acetone is easily oxidized with :
a. Benedict’s solution
b. Fehling solution
c. Acidic dichromate solution
d. Tollen’s reagent

25. 23 Problem
Which of the following is soluble in water ?
a. C2H5OH
b. CHCl3
c. Cs2
d. CCl4

26. 24 Problem
Baeyer’s reagent is used in the laboratory for?
a. Detection of double bond
b. Detection of glucose
c. Reduction process
d. Oxidation process

27. 25 Problem
SIDROSIS diseases is caused by excess intake element’s which is :
a. Mobudium
b. Copper
c. Zinc
d. Iron

28. 26 Problem
Graphite is soft because :
a. It is back
b. It has low density
c. It has layer structure
d. It has three dimensional structure

29. 27 Problem
Mrash gas is :
a. Methane
b. Ethane
c. Ethylene
d. Acethylene

30. 28 Problem
The reaction, C8H18 C5H12 + C4H10 + C8H16 + represents :
a. Catalytic oxidation
b. Isomerisation
c. Cracking
d. Synthesis

31. 29 Problem
Polythene is a polymer of :
a. C4H10
b. C3H6
c. C2H4
d. C2H2

32. 30 Problem
The vitamins present in oils and fats are :
a. A and C
b. B and C
c. A and B
d. A and C

33. 31 Problem
PVC is :
a. Thermoplastic polymer
b. Compound polymer
c. Thermosetting polymer
d. Simple polymer

34. 32 Problem
Which element is known as ‘GIRLS BEST FRIEND’ ?
a. Plutonium
b. Diamind
c. Silver
d. Gold

35. 33 Problem
Group belong to :
a. Aldehyde
b. Alcohol
c. Ketone
d. Acid

36. 34 Problem
The acid is used as VINEGAR for preparation of pickles :
a. Oxalic acid
b. Citraic acid
c. Acetic acid
d. Formic acid

37. 35 Problem
Polmific acid and steric acid are used as :
a. Medicine
b. Soap
c. Anticeptic cream
d. Pickle

38. 36 Problem
The hardest substance among the following is :
a. Graphite
b. Anthracite
c. Lignite
d. Peat

39. 37 Problem
Drip-day clothes are made up of :
a. Polyster
b. Decrone
c. Rayon
d. Nylon

40. 38 Problem
The carbon contents in lamp black is about :
a. 98-99%
b. 90-955
c. 80-90%
d. 10-20%

41. 39 Problem
Neoprene is a polymer of :
a. 1-bromobutadiene
b. 2-chlorobutadiene
c. 2-bromobutadiene
d. 1-chlorobutadiene

42. 40 Problem
Rayon is :
a. Synthetic plastic
b. Natural rubber
c. Natural silk
d. Artificial silk

43. 41 Problem
The natural cleaning agent are found in river :
a. Marine animal
b. Plants
c. Algae
d. Fungi

44. 42 Problem
Which of the following is used as a preservative for biological specimens ?
a. Acetic acid
b. Formic acid
c. Formalin
d. Liquid NH3

45. 43 Problem
Name the compounds which affects the ozone layer :
a. Chloro compound
b. Fluro compound
c. Bromo compound
d. Iodo compounds

46. 44 Problem
Nitrogen is an essential constituent of all :
a. Proteins and fats
b. Fats
c. Proteins
d. None of these

47. 45 Problem
Which is the pH value corresponding to iso-electric point of an aqueous
solution of glycine :
a. pH = 6
b. pH = 0
c. pH = 7
d. pH > 7

48. 46 Problem
The main agent for polluting the environment is :
a. Gas
b. Plant
c. Animal
d. Man

49. 47 Problem
Inosphere is :
a. Above ozone layer
b. Below ozone layer
c. Bleow 15 kg in earth crust
d. None of these

50. 48 Problem
Molar heat capacity is given by :
dQ
a. dT
b. dQ x Dt
1
c. dT
1
d. Q
T

51. 49 Problem
The distance between nucleons in atomic nucleus is of the order of (1 F = 10-13
cm) :
a. 1000 Fermi
b. 200 Fermi
c. 50 Fermi
d. 2 Fermi

52. 50 Problem
Nuclear reactions are balanced in terms of :
a. Only mass
b. Only energy
c. Number of electrons
d. Mass and energy

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