This document contains an unsolved chemistry paper from 2000 containing 50 multiple choice questions testing concepts such as: 1) Properties and reactions of acids, bases, salts, and other chemicals 2) Gas laws, thermodynamics, equilibrium, and stoichiometry 3) Structure and bonding in organic and inorganic compounds 4) Characteristics and trends in the periodic table 5) Techniques for separating and purifying compounds The questions cover a wide range of fundamental chemistry topics and are intended to evaluate students' understanding of core concepts through multiple choice responses.

1. AMU –PAST PAPERS
CHEMISTRY- UNSOLVED PAPER - 2000

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
Gold number represents:
a. Percentage of gold in biscuits
b. Percentage quantity of gold in alloys
c. Quantity of gold in alloys
d. Colloid protective power

4. 02 Problem
When a liquid boils, there is an increase in?
a. Heat of vaporization
b. Potential energy
c. Entropy
d. Free energy

5. 03 Problem
Picric acid is:
a. Trinitoglycerine
b. Trinitroaniline
c. 2, 4, 6-trinitrophenol
d. trinitrotoluene

6. 04 Problem
The normality of pure and conc. H2SO4
a. 36 N
b. 28 N
c. 14 N
d. 4 N

7. 05 Problem
C3H9N can not represents:
a. Quaternary salt
b. 30 amine
c. 20 amine
d. 10 amine

8. 06 Problem
A gas on passing through ammoniac solution of AgNO3 does not give any
precipitate but decolorizes alkaline KMnO4 solution. The gas may be:
a. C2H2
b. C2H4
c. C2H6
d. C3H7

9. 07 Problem
The enthalpies of all elements in their standard states are:
a. Zero
b. >0
c. <0
d. unity

10. 08 Problem
Cryolite (Na3.AlF3) is used in the electrolytic extraction of aluminum:
a. as a reducing agent
b. to dissolve bauxite
c. to obtain more alum
d. to protect anodes

11. 09 Problem
Which reaction is endothermic in nature?
a. NaOH HCl NaCl H2 0
CaCO3 CaO CO2
b.
c. Fe S FeS
d. CH4 2O2 CO2 2H2O

12. 10 Problem
Which of the weakest among the following bonds?
a. Covalent bond
b. Hydrogen bond
c. Metallic bond
d. Ionic bond

13. 11 Problem
In which of the following molecule all atoms are coplanar:
a. NH3-
b. PF3
c. BF3
d. CH4

14. 12 Problem
Solubility products of AgCl, AgBr, and AgI at 298 K are 1.7x10-10, 5.0 x 10-13
and 8.5 x 10-6 mol/liter aqueous solution of KCL or KBr or KI will:
a. Precipitate as AgI
b. Precipitate as AgCl
c. Precipitate as AgBr
d. None of these

15. 13 Problem
When propionic acid is treated with aqueous NaHCO3, CO2 is liberated. The C of
CO2 comes from ?
a. NaHCO3
b. - CH3 group
c. - COOH group
d. - CH2 group

16. 14 Problem
In the following equilibrium of conjugate acid and bases :
(i) HCl aq H2O l  H2O(aq) Cl(aq)
(ii) HCO3 (aq) HCl(l )  H2CO3 (aq) Cl (aq)
NH3 aq H2O l  NH4 aq OH aq
(iii)
HCO3 aq NH3 aq  NH4 aq CO3 2 aq
(iv)
a. NH3(aq) and HCO3- (aq)
b. H2O(l) and NH4+ (aq)
c. H2O(l) and HCO3-(aq)
d. NH3(aq) and H3O(l)

17. 15 Problem
Which is most important polymer ?
a. BHC
b. DDT
c. DMF
d. PVC

18. 16 Problem
On passing current through two cells connected in series containing solution of
AgNO3 and CuSO4; 0.18 g of Ag is deposited. The amount of the deposited is :
a. 0.6254 g
b. 10.623 g
c. 0.06354 g
d. 1.2708 g

19. 17 Problem
The gas used of for artificial ripening of fruits is :
a. C2H2
b. C2H4
c. CH4
d. C2H6

20. 18 Problem
for CH3COOH is obtained from the :
1000K
a. Relation C
b. value at infinite dilution
c. Intercept of the above plot
d. Kohlrach’s reaction

21. 19 Problem
Hydrocarbon liquid at STP is :
a. Butane
b. Pentane
c. Propane
d. Ethane

22. 20 Problem
Electronegative character of hydrogen is shown in :
a. LiH, CaH2, MgH2
b. HCl, HNO3, CaH2
c. HCl, AsH3, MgH2
d. HCl, H2SO4, HClO4

23. 21 Problem
Heavy water freezes at :
a. - 3.80C
b. 00C
c. 3.80C
d. 380C

24. 22 Problem
The total number of structural isomers possible for structure C3H6 is :
a. 4
b. 3
c. 2
d. 1

25. 23 Problem
Alkali metals can not be obtained by the reduction of their oxides because
they:
a. Are strong reducing agents
b. Are strong oxidizing agents
c. Are easily reduced
d. Decompose water

26. 24 Problem
Which species is the strongest oxidizing agent?
a. Zn2+
b. Pb2+
c. Cu2+
d. Br

27. 25 Problem
The most basic carbonate is :
a. BaCO3
b. MgCO3
c. CaCO3
d. CuCO3

28. 26 Problem
The process of photography is based on the fact that silver bromide is lightly :
a. Colourful
b. Reflective
c. Cheap
d. Pure

29. 27 Problem
H3BO5 on heating up to 3700 K yields:
a. Boric anhydride
b. Orthoboric acid
c. Metaboric acid
d. Tetraboric acid

30. 28 Problem
In 3d-series, the atomic radius of elements:
a. Increases from Sc to Ni and then decreases
b. Decreases from Sc to Ni and then increases
c. Increases from Sc to Zn
d. Decreases from Sc to Zn

31. 29 Problem
Which one is a metalloid?
a. Germanium
b. Carbon
c. Silicon
d. Tin

32. 30 Problem
Find the frequency of light that corresponds to photons of energy 5.0 x 10-15erg :
a. 7.5 x 10-21 sec-1
b. 7.5 x 10-21 sec1
c. 7.5 x 1021 sec-1
d. 7.5 x 1021 sec

33. 31 Problem
The strength of an acid depends upon its tendency to :
a. Accept electrons
b. Lose electrons
c. Donates proton
d. Accept protons

34. 32 Problem
Conc.HNO3 on heating in presence of P2O5 gives:
a. NO
b. NO2
c. N2O
d. N2O5

35. 33 Problem
The IUPAC name of CH3CH=CHCH2CH2. CH2CH3 is:
a. 2-heptene
b. 5-heptene
c. 2-heptane
d. 5-heptane

36. 34 Problem
Which aqueous solution will have pH less than7:
a. NaCN
b. KNO3
c. FeCL3
d. NaOH

37. 35 Problem
A hydrocarbon contains 85.71% carbon and 14.3%, hydrogen. The vapour
density is 14. On reaction with ozone it gives an ozonides. The hydrocarbon is :
a. Ethene
b. Acetylene
c. Propane
d. Ethane

38. 36 Problem
An ore like zinc blende is concentrated by :
a. Magnetic separation
b. Forth floatation
c. Washing with water
d. Leaching

39. 37 Problem
Ethyne can be distinguished from ethane by the action of :
a. Bayer’s reagent
b. Conc. H2SO4
c. Bromine dissolved
d. Ammonical silver nitrate

40. 38 Problem
The ideal gas equation is given by the expression :
3
PV RT
a. 2
b. PV=nRT
P1V1
c. P2V2T2
T1
d. none of these

41. 39 Problem
BF3 is acidic because:
a. It can donated a pair of electron
b. It can donate a proton
c. It accepts a pair of electron
d. None of these

42. 40 Problem
Osmotic pressure of solution I and II obtained by dissolving respectively, 5 gm of
urea and 15 gm fructose (Molecular weight =180) in liter of water each bear the
ratio:
a. 1:3
b. 3:1
c. 1:1
d. 2:3

43. 41 Problem
The general formula of halo alkene is :
a. CnH2n-2X
b. CnH2n-2X
c. CnH2nX
d. CnH2n-1X

44. 42 Problem
Which of the following from lyophilic solution?
a. Aluminum hydroxide
b. Arsenic sulphide
c. Egg albumin
d. Silver halides

45. 43 Problem
Enthalpy of a chemical reaction can be represented by :
a. H S E
b. H= E+ S
c. H= E+P V+V P
T
d. H= E

46. 44 Problem
The reaction represented in the diagram is :
a. Endothermic
b. Exothermic
c. Reversible
d. Irreversible

47. 45 Problem
In a reaction, the rate expression is, rate=K[A][B]2/3. The order of reaction is:
a. Zero
b. 1
c. 2
d. 5/3

48. 46 Problem
Which of the following electronic configuration element?
a. 1s2, 2s2 2p6,3p6 3d10,4p6
b. 1s2, 2s2 2p6,3s2 3s6,4s2
c. 1s2, 2s2 2p6,3s2 3p6,3d10,4s24p1
d. 1s2, 2s2 2p6,3s2 3p6,3d4,4s2

49. 47 Problem
The best technique employed for concentration and purification of a
compound is ;
a. Fractional distillation
b. Sublimation
c. Steam distillation
d. Chromatography

50. 48 Problem
Relationship between average kinetic energy and absolute temperature of a gas
can be shown by :
RT
a. EK
PV
3
b. EK RT
2
RT
c. PV
EK
2
d. EK RT
3

51. 49 Problem
Which of the following can not be a unit for measuring pressure ?
a. Atmosphere
b. Torr
c. Pascal
d. Newton

52. 50 Problem
The bond length between C – C in ethylene molecule is :
a. 1.19 Å
b. 1.35 Å
c. 1.54 Å
d. 2.4 Å

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