This chemistry exam from 2005 contains 52 multiple choice questions testing concepts in general chemistry. Some of the key topics covered include: - Properties of solutions including concentration units, freezing point depression, and solubility products - Chemical bonding including types of bonds and hybridization - Reaction kinetics including rate constants and reaction orders - Thermochemistry including equilibrium constants and Le Chatelier's principle - Descriptive chemistry including properties of elements, compounds, and chemical reactions.

1. UPSEE–PAST PAPER
CHEMISTRY- UNSOLVED PAPER - 2005

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 concentration units is independent of temperature ?
a. Normality
b. Morality
c. Formality
d. Molality

4. 02 Problem
x
In the reaction R C N 4(H) RCH2NH2 X can be :
a. LiAlH4
b. H2SO4
c. Ni
d. 2KBr

5. 03 Problem
At a given temperature the equilibrium constant for the reaction of :
PCl 5 PCl3 + Cl2 is 2.4 x 10-3. At the same temperature, the equilibrium constant
for the reaction PCl3(g) + Cl2(g)  PCl5(g) is :
a. 2.4 x 10-3
b. -2.4 x 10-3
c. 4.2 x 102
d. 4.8 x 10-2

6. 04 Problem
Which of the following is called polyamide?
a. Terylene
b. Rayon
c. Nylon
d. Orlon

7. 05 Problem
For the gaseous reaction C2H4 H2  C2H6 , H 130 kJ mol-1 carried in a
closed vessel, the equilibrium concentration of the c2H6 can definitely be
increased by :
a. Increasing temperature and increasing pressure
b. Decreasing temperature and increasing pressure
c. Increasing temperature and pressure both
d. Decreasing temperature and increasing pressure

8. 06 Problem
The number of electrons in the valence shell of sulphur in SF6 is :
a. 12
b. 10
c. 8
d. 11

9. 07 Problem
The minimum energy required for the reacting molecules to undergo reaction is :
a. Potential energy
b. Kinetic energy
c. Thermal energy
d. Activation energy

10. 08 Problem
The only non-metal which is liquid at ordinary temperature is :
a. Hg
b. Br2
c. NH3
d. none of these

11. 09 Problem
Which of the following is correct for the reaction N2(g) + 3H2(g)  2NH3(g)
a. Kp = Kc
b. Kp < Kc
c. Kp > Kc
d. Pressure is required to predict the correlation

12. 10 Problem
The rate constant of a first order reaction is 6.9 x 10-3 s-1. How much time will it
take to reduce the initial concentration to its 1/8th value ?
a. 100 s
b. 200 s
c. 300 s
d. 400 s

13. 11 Problem
Which has the minimum freezing point ?
a. One molal NaCl aq. Solution
b. One molal CaCl2 aq. Solution
c. One molal KCl aq. Solution
d. One molal urea aq. Solution

14. 12 Problem
sp3 d hybridization results in :
a. a square planar molecule
b. an octahedron molecule
c. a trigonal biyramidal molecule
d. a tetrahedron molecule

15. 13 Problem
The compound having the lowest oxidation state of iron is :
a. K4Fe(CN)6
b. K2FeO4
c. Fe2O3
d. Fe(CO)5

16. 14 Problem
Among the following, the most acidic is :
a. CH3COOH
b. ClCH2COOH
c. Cl2CHCOOH
d. Cl2CHCH2COOH

17. 15 Problem
Rutherford’s experiment on the scattering of -particles showed for the first time
that the atom has :
a. Electrons
b. Protons
c. Nucleus
d. Neutrons

18. 16 Problem
For a Bohr atom angular momentum M of the electron is : (n = 0, 1, 2, ….)
nh2
a.
4
n2h2
b.
4
nh2
c.
4
nh
d.
4

19. 17 Problem
An example of dispersion of a liquid in a gas is :
a. Milk
b. Vegetable oil
c. Foam
d. Mist

20. 18 Problem
Which of the following combination will form an electrovalent bond ?
a. P and Cl
b. NH3 and BF-3
c. H and Ca
d. H and S

21. 19 Problem
How many moles of Al2(SO4)3 would be in 50 g of the substance ?
a. 0.083 mol
b. 0.952 mol
c. 0.481 mol
d. 0.140 mol

22. 20 Problem
Teflon polymer is formed by polymerization of
a. CH2 = CH – CN
b. F2C = CF2
c. Cl2C = CH2
d. H2C = CHCl

23. 21 Problem
The IUPAC name of the compound CH2CONHBr is :
a. 1-bromoacetamide
b. ethanoylbromide
c. N-bromoethanmide
d. None of the above

24. 22 Problem
Which of the following is a condensation polymer ?
a.
b. Rubber
c. Polyvinyl chloride
d. Polyethylene

25. 23 Problem
The solubility of CaF2 in pure water is 2.3 x 10-4 mol dm-3. Its solubility product
will be :
a. 4.6 x 10-4
b. 4.6 x 10-8
c. 6.9 x 10-12
d. 4.9 x 10-11

26. 24 Problem
Copper sulphate solution, when added to an excess of ammonium
hydroxide, forms a complex compound due to :
a. [Cu(NH3)2]2+
b. [Cu(NH3)4]2+
c. [Cu(NH3)6]2+
d. Cu2+

27. 25 Problem
If a solution containing 0.072 g atom of sulphur in 100 g of a solvent (kf = 7.0)
gave a freezing point depression of 0.840C, the molecular formula of sulphur in
the solutions is :
a. S6
b. S7
c. S8
d. S9

28. 26 Problem
Which of the following is a dynamic isomerism ?
a. Metamerism
b. Geometricla isomerism
c. Tautomerism
d. Co-ordinate isomerism

29. 27 Problem
When K2Cr2O7 is converted into K2CrO4, the change in oxidation number of
chromium is :
a. 0
b. 5
c. 7
d. 9

30. 28 Problem
Which of the following will be most effective in the coagulation of Fe(OH)-3 sol ?
a. KCN
b. BaCl2
c. NaCl
d. Mg3(PO4)2

31. 29 Problem
For d block elements the first ionization potential is of the order :
a. Zn > Fe > Cu > Cr
b. Sc = Ti < V = Cr
c. Zn < Cu < Ni < Co
d. V > Cr > Mn > Fe

32. 30 Problem
In (+) glucose the number of chiral centers is :
a. 4
b. 6
c. 0
d. 5

33. 31 Problem
Mohr salt is made up of which combination of salt ?
a. Ammonium sulphate and potash
b. Ammonium sullphate and ferrous sulphate
c. Ammonium sulphate and copper sulphate
d. Ammonium sulphate and magnesium sulphate

34. 32 Problem
High basicity of Me2NH relative to Me3N is attributed to :
a. Effect of solvent
b. Inductive effect of Me
c. Shape of Me2NH
d. Shape of Me3N

35. 33 Problem
Which is the correct order of electronegativity ?
a. F > N < O > C
b. F > N > O > C
c. F > N > O < C
d. F < N < O = C

36. 34 Problem
In the reaction
X is :
a. SiC
b. H2SO4
c. KMnO4
d. Fe/HCl

37. 35 Problem
In Grignard reagent the carbon-magnesium bond is :
a. Electrovalent
b. Covalent
c. Dative
d. Hydrogen bonding

38. 36 Problem
The radius of hydrogen atom in the ground state is 0.53 Å. The radius of Li2+ ion
(atomic number = 3) in a similar state is :
a. 0.176 Å
b. 0.30 Å
c. 0.53 Å
d. 1.23 Å

39. 37 Problem
Tyndall effect shown by colloids is due to :
a. Scattering of light by the particles
b. Movements of particles
c. Reflection of light by the particles
d. Coagulation of particles

40. 38 Problem
Iodine is :
a. Electrovalent solid
b. Atomic solid
c. Molecular solid
d. Covalent solid

41. 39 Problem
Fe2+ ion is distinguished from Fe3+ ion by :
a. BaCl2
b. KCN
c. NaNO3
d. NH4SCN

42. 40 Problem
Among the following, the monosaccharide is:
a. Cellulose
b. Starch
c. Fructose
d. Sucrose

43. 41 Problem
Lattice energy of a solid increases if :
a. Size of ions are small
b. Charges of ions are small
c. Ions are neutral
d. None of the above

44. 42 Problem
Which of the following will not give a positive iodoform test ?
a. CH3CH2CHOHCH3
b. CH3CH2CH2COCH3
c. CH3CH2COCH2CH3
d. CH3COC6H5

45. 43 Problem
The reason for the loss of optical activity of lactic acid when OH group is changed
by H is that :
a. Chiral centre of the molecule is destroyed
b. Molecules acquires asymmetry
c. Due to change in configuration
d. Structural changes occurs

46. 44 Problem
To distinguish between salicylic acid and phenol one can use :
a. NaHCO3 solution
b. 5% NaOH solution
c. neutral FeCl3
d. bromine water

47. 45 Problem
C - H bond energy is about 101 kcal/mol for methane, ethane and other alkanes
but is only 77 kcal/mol for C – H bond of CH3 in toluene. This is because :
a. of inductive effect due to – CH3 in toluene
b. of the presence of benzene ring in toluene
c. of resonance among the structures of benzyl radical in toluene
d. aromaticity of toluene

48. 46 Problem
In a 1st order reaction, reactant concentration C varies with time t as :
a. 1/C increases linearly with t
b. log C decreases linearly with t
c. C decreases with 1/t
d. log C decreases with 1/t

49. 47 Problem
Which of the following ions can be replaced by H+ ions when H2 gas is bubbled
through the solutions containing these ions ?
a. Li
b. Ba2+
c. Cu2+
d. Be2+

50. 48 Problem
Among BMe3, BF3, BCl3 and B2H6 which one will be the best Lewis acid ?
a. BCl3
b. BMe3
c. B2H6
d. BF3

51. 49 Problem
Alum is added to muddy water because :
a. It acts as disinfectant
b. It results in coagulation of clay and sand
c. Clay is soluble in alum, hence removes it
d. It makes water alkaline, which is good for health

52. 50 Problem
NH3 gas is dried over :
a. CaO
b. NHO3
c. P2O5
d. CuSO4

53. 51 Problem
Which one of the following is not correct for an ideal solution ?
a. It must obey Raolut’s law
b. H = 0
c. C = 0
d. H V 0

54. 52 Problem
Borax bead test of Cr(chromium) is :
a. Green
b. Blue
c. Violet
d. Brown

55. 53 Problem
A catalyst :
a. Lowers the activation energy
b. Change the rate constant
c. Change the product
d. Itself destroys in the reaction

56. 54 Problem
Which of the following is cross-linked polymer ?
a. Teflon
b. Orlon
c. Nylon
d. Bakelite

57. 55 Problem
The IUPAC name of CH3 – CH2 – CHO:
a. Propanal-1
b. 2-ethylbutanal
c. butanal-1
d. pentanal-1

58. 56 Problem
in the reaction sequence :
products
Products will be :
a. CH3COCH3
b. CH3COCH2OH
c. CH3COOH + HCOOH
d. CH3CHO + HCHO

59. 57 Problem
The conditions for aromaticity is :
a. Molecule must have clouds of delocalised electrons
b. Molecule must contain (4n + 2) electrons
c. Both a and b
d. None of the above

60. 58 Problem
Vinyl chloride undergoes :
a. Only addition reaction
b. Only elimination reaction
c. Both a and b
d. Substitution reactions

61. 59 Problem
Which of the following increases the octane number ?
a. Branching of chain
b. Absence of double and triple bond
c. Non-cyclic alkanes
d. None of the above

62. 60 Problem
Ethyl alcohol can be prepared from Grignard reagent by the reaction of :
a. HCHO
b. R2CO
c. RCN
d. RCOCl

63. 61 Problem
Chlorobenzene gives aniline with :
1. NH3/Cu2O
2. NH3/H2SO4
3. NaNH2
4. None of these

64. 62 Problem
In CsCl type structure the co-ordination of Cs+ and Cl- are :
a. 6, 6
b. 6, 8
c. 8, 8
d. 8, 6

65. 63 Problem
Hess’s law is used to calculate :
a. Enthalpy of reaction
b. Entropy of reaction
c. Work done in reaction
d. All of the above

66. 64 Problem
Which of the following is not a Lewis base ?
a. NH3
b. H2O
c. AlCl3
d. None of these

67. 65 Problem
Allene (C3H4) contains :
a. One double bond, one triple bond and one single bond
b. One triple and two doubled bonds
c. Two triple and one double bond
d. Two double and four single bond

68. 66 Problem
Active charcoal is a good catalyst because :
a. Made up of carbon atoms
b. Is very reactive
c. Has more adsorption power
d. Has inert nature toward reagent

69. 67 Problem
H2 cannot be displaced by :
a. Li+
b. Sr2+
c. Al3+
d. Ag+

70. 68 Problem
Which of the following is amphoteric ?
a. V2O3
b. CuO
c. V2O5
d. NiO

71. 69 Problem
The emf of the (E zn2 / zn
0.76 V )Zn / Zn2 (1M ) || Cu2 (1M )Cu (ECu2 / Cu
0.34 V )
cell, will be :
a. + 1.10 V
b. - 1.1.0 V
c. + 0.42 V
d. - 0.41 V

72. 70 Problem
Which of the following is correct number of carbon atom present as the
constituent of kerosene oil ?
a. C10 – C16
b. C4 – C6-
c. C8 – C16
d. C12 – C18

73. 71 Problem
Plaster of Paris is a white powder of formula :
1
a. CaSO4 . 2 H2O
b. CaSO4 . 2H2O
c. CaSO4 . H2O
3
d. CaSO4 . 2 H2O

74. 72 Problem
Water possesses a high dielectric constant, therefore :
a. It always contains ions
b. It is a universal solvent
c. Can dissolve covalent compounds
d. Can conduct electricity

75. 73 Problem
Ribose is an example of :
a. Ketohexose
b. Disaccharide
c. Pentose
d. Polysaccharide

76. 74 Problem
Aldehydes can be oxidized by :
a. Tollen’s reagent
b. Fehling solution
c. Benedict solution
d. All of the these

77. 75 Problem
The for CO2(g), CO(g) and H2O(g) are –393.5, - 110.5 and –241.8 kJ/mol
respectively. The standard enthalpy change (in kJ) for the reaction
CO2(g) + H2(g)→ CO (g) is :
a. 524.1
b. 41.2
c. - 262.5
d. - 41.2

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