The document contains 50 multiple choice questions from an unsolved chemistry past paper from 1999. The questions cover a range of chemistry topics including organic chemistry reactions, properties of elements, acid-base chemistry, stoichiometry, gas laws, and more. The full solutions to the questions are not provided in the document.

1. AMU –PAST PAPERS
CHEMISTRY- UNSOLVED PAPER - 1999

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
Which of the following groups activates benzene nucleus towards electrophilic
substiution ?
a. - CHO
b. - CN
c. - COOR
d. - OCOR

4. 02 Problem
which one is nucleophilic addition ?
a. CH3CHO + HCN CH3CH(OH)CN
b. CH2 = CH2 + H2 CH3 – CH3
c. CH3CH = CH2 + H2 CH3CH2CH3Br
d. CH2 = CH2 + Br CH2Br – CH2Br

5. 03 Problem
The reagent with which both acetaldehyde and acetone react easily is :
a. Schiff’s reagent
b. Tollen’s reagent
c. Grignard reagent
d. Fehling solution

6. 04 Problem
In the flame test a brick red colour is indication of :
a. Ca
b. Sr
c. K
d. Na

7. 05 Problem
The haemoglobin from red blood corpuscles of most mammals contain
approximately 0.33%of iron by mass. The molecular weight of haemoglobin is
67200. The number of iron atoms in each molecule of haemoglobin is :
a. 2
b. 3
c. 4
d. 6

8. 06 Problem
Which of the following formula represent to 2-methyl pentane ?
a.
b.
c.
d.

9. 07 Problem
What is the last product ‘C’ of the following reaction sequence ?
a.
b.
c.
d.

10. 08 Problem
Neutron was discovered by :
a. Chadwick
b. Moseley
c. Faraday
d. H. Yukama

11. 09 Problem
The reaction of ethylene glycol with PI3 gives :
a. CH2 = CH – I
b. I – CH = CH – I
c. ICH2CH2I
d. CH2 = CH2-

12. 10 Problem
The smallest ion among the following is that of :
a. Ca
b. Mg
c. Li
d. Be

13. 11 Problem
When phenol is heated with ammonia in presence of anhydrous zinc of
calcium chloride, it gives :
a. Ethyl amine
b. Benzene
c. Toluene
d. Aniline

14. 12 Problem
Which of the following composition is capable of giving only two isomers ?
a. C4H10
b. C5H12
c. C3H8
d. C2H6

15. 13 Problem
Strongest acid among the following is :
a. CCl3COOH
b. CF3COOH
c. CBr3COOH
d. CH3COOH

16. 14 Problem
The maximum number of electron in an orbital is :
a. 8
b. 6
c. 4
d. 2

17. 15 Problem
Which of the following paramagnetic ?
a. NO+
b. CO
c. CN –
d. O2 –

18. 16 Problem
What happens when Ca is heated over O2 ?
a. Formation of CaO + CaC2
b. CaO + C is formed
c. CaC2 + O2 is formed
d. None of these

19. 17 Problem
Bromine can be liberated form potassium bromide solution by the action of :
a. Potassium iodide
b. Iodine solution
c. Chlorine water
d. Sodium chlorine

20. 18 Problem
Which reaction will lead to anti markownikoff addition in the presence of a
proxide ?
HCl
a. CH3CH = CH2
HI
b. CH3CH = CH2
HBr
c. CH3CH - CH2
H2O
d. CH3CH = CH2

21. 19 Problem
In the electrolysis of alumina, cryolite is added to :
a. Increase the electrical conductivity
b. Increase the melting point of alumina
c. Remove impurities from alumina
d. Minimize the anodic effect

22. 20 Problem
The energy with which an atom binds the electrons is experimentally
determined by measuring its :
a. Electron negativity
b. Electron affinity
c. Atomic size
d. Ionization potential

23. 21 Problem
Which of the following is a mixed anhydride ?
a. N2O5
b. NO2-
c. N2O
d. NO

24. 22 Problem
In halogen acids the order of decreasing acidity is :
a. HCl, HBr, HI, HF
b. HI, HBr, HF, HCl
c. HI, HBr, HCl, HF
d. HCl, HBr, HF, HI

25. 23 Problem
Which elements are chemically most similar ?
a. Ti, Zn
b. Zr, Hf
c. Na, Al
d. Cu, S

26. 24 Problem
The atom with atomic number 20 will likely combine with the atom whose
atomic number is ?
a. 25
b. 21
c. 16
d. 14

27. 25 Problem
Which of the following electronic configuration in the outermost shell is
characteristic of alkali metals ?
a. (n -1)s2p6ns-1
b. (n -1)s2p6ns2np1
c. (n -1)s2p6d1
d. (n -1)s2p6d103s-1

28. 26 Problem
A diagonal relationship exist between
a. Na and Ca
b. Mg and K
c. Li and Ca
d. Li and Mg

29. 27 Problem
Alkali metals cannot be obtained by reduction of their oxides because they :
a. Are strong reducing agents
b. Are strong oxidizing agents
c. Are early reduced
d. Decompose water

30. 28 Problem
Qualitative test of halogens in an organic compound is made by :
a. Lassaigne’s test
b. Beilstein test
c. Bayer’s test
d. Fehling’s test

31. 29 Problem
Dipole moment is shown by :
a. trans-1,2-dichloro-2pentene
b. trans-1,2-dichloroethane
c. cis-1,2-dichloroethene
d. both a and c

32. 30 Problem
In sulphuric acid the oxidation number of S is :
a. + 2
b. + 6
c. - 4
d. - 2

33. 31 Problem
50.c.c. of 0.1 N solution of AgNO3 are added to 500 c.c. of 0.1 N solution of
KCl. The concentration of nitrate in the resulting mixture is :
a. 0.05 N
b. 0.2 N
c. 0.1N
d. 1 N

34. 32 Problem
When chlorine water and carbon tetrachloride are added to a solution of an
iodine shaken, the colour produced is :
a. Brown
b. Yellow
c. Orange
d. Violet

35. 33 Problem
100 g of a NaOH solution contains 0.1 mole of NaOH, the molality of the solution
is :
a. 1.04 m
b. 4 m
c. 5 m
d. 10 m

36. 34 Problem
A hydrocarbon analysis for C and H are 75% and 25% respectively, then molecular
formula is :
a. C3H8
b. C2H6
c. C2H4
d. CH4

37. 35 Problem
How many moles of oxygen are contained in one litre of air under-standard
conditions if it contains 21%(by volume) oxygen ?
a. 0.0093 mole
b. 0.816 mole
c. 0.21 mole
d. 2.10 mole

38. 36 Problem
The reaction NH4 NO3 N2O 2H2O involves :
a. Oxidation
b. Reduction
c. Both ‘a’ and ‘b’
d. None of these

39. 37 Problem
Oxidising number of Fe in K3[Fe(CN)6]
a. + 1
b. + 2
c. + 3
d. + 4

40. 38 Problem
Free-radical reactions are generally catalized by :
a. Polar solvents
b. Acids
c. Bases
d. Light

41. 39 Problem
The compounds which contains both ionic and covalents bonds is :
a. KCN
b. KCl
c. CH4
d. H2

42. 40 Problem
Radio-carbon study make use of carbon isotope with atomic weight :
a. 16
b. 15
c. 14
d. 13

43. 41 Problem
Variable valency is a characteristic of :
a. s-block elements
b. p-block elements
c. d-block elements
d. all elements

44. 42 Problem
The roasted ore is heated in a vertical retort with powdered coal and the metal
is obtained by condensation of vapours. The metal is :
a. Ag
b. Fe
c. Sn
d. Zn

45. 43 Problem
In which of the following AgCl will be least soluble ?
a. 0.01 1 M NaCl
b. 0.01 M CaCl4
c. 0.001 M AgNO3
d. Pure water

46. 44 Problem
The ester of 1, 2, 3 propartroid are called :
a. Glyceric acids
b. Glycerides
c. Glycerines
d. Glycerels

47. 45 Problem
In sodium acetate is added to acetic acid then the concentration of H+ ion will
be :
a. Increased
b. Decreased
c. Un-affected
d. PH decreased

48. 46 Problem
Oxidation of toluene in the presence of acetic anhydride followed by alkaline
hydrolysis yields :
a. Benzene
b. Phenol
c. Benzaldehyde
d. Benzoic acid

49. 47 Problem
Which of the following possesses highest melting point ?
a. Chlorobenzene
b. o-dichlorobenzene
c. m-dichlorobenzene
d. p-dichlorobenzene

50. 48 Problem
the specific rate constant of a first order depends on the :
a. concentration of the product
b. concentration of the reactant
c. temperature
d. time

51. 49 Problem
Which of the following will not give HVZ reaction ?
a. Trichloroethanoic acid
b. 2-methyl botanic acid
c. Ehtanonic acid
d. Propanoic acid

52. 50 Problem
Faraday’s law of electrolysis are related to the :
a. Speed of the cation
b. Atomic number of the cation
c. Atomic number of the anion
d. Equivalent weight of the electrolyte

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