1. UPSEE–PAST PAPER
CHEMISTRY- UNSOLVED PAPER - 2007

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
How many unit cells are present in a cube shaped ideal crystal of NaCI of mass
1.00 g ? [Atomic masses : Na = 23, Cl = 35.5]
a. 2.57 x 1021
b. 5.14 x 102
c. 1.28 x 1021
d. 1.71 x 1021

4. 02 Problem
Graphic is a soft solid lubricant extremely difficult to melt. The reason for this
anomalous behaviour is that, graphite
a. Is a non-crystalline substance
b. Is an allotropic form of diamond
c. Has molecules of variable molecular masses like polymers
d. Has carbon atoms arranged in large plates of ring of strongly bound carbon
atoms with weak interplate bonds

5. 03 Problem
When CH2 = CH – COOH is reduced with LiAlH4, the compound obtained will be
a. CH3 – CH2 – COOH
b. CH2 = CH – CH2OH
c. CH3 – CH2 – CH2OH
d. CH3 – CH2 –CHO

6. 04 Problem
Which one of the following compounds has the smallest bond angle in its
molecule ?
a. SO2
b. OH2
c. SH2
d. NH3

7. 05 Problem
The solubility in water of a sparingly soluble salt AB2 is 1.0 x 10-5 mol L-1. Its
solubility product number will be
a. 4 x 10-15
b. 4 x 10-10
c. 1 x 10-15
d. 1 x 10-10

8. 06 Problem
For the redox reaction Zn(s) + Cu2+ (0.1 M) Zn2+ (1 M) + Cu(s) taking place in a
cell, Eocell is 1.10 V. Ecell for the cell will 2.303 RT
be 0.0591
F
a. 2.14 V
b. 1.80 V
c. 1.07 V
d. 0.82 V

9. 07 Problem
The rate law for a reaction between the substances A and B is given by rate =
k[A]n[B]m. On doubling the concentration of A and halving the concentration of
B, the ratio of the new rate to the earlier rate of the reaction will be as
1
a. m n
2
b. (m + n)
c. (n - m)
d. 2(n - m)

10. 08 Problem
If at 298 K the bond energies of C – H, C – C, C = C and H- H bonds are
respectively 414, 347, 615 and 435 kJ mol-1, the value of enthalpy change for the
reaction
H2C = CH2(g) + H2(g) H3C – CH3(g) at 298 K will be
a. + 250 kJ
b. - 250 kJ
c. + 125 kJ
d. - 125 kJ

11. 09 Problem
For the reaction system, 2NO(g) + O2(g) →2NO2(g) volume is suddenly reduced to
half its value by increasing the pressure on it. If the reaction is of first order with
respect to O2 and second order with respect to NO; the rate of reaction will
a. Diminish to one-fourth of its initial value
b. Diminish to one-eighth of its initial value
c. Increase to eight times of its initial value
d. Increase to four times of its initial value

12. 10 Problem
Which one of the following characteristics is not correct for physical adsorption ?
a. Adsorption on solids is reversible
b. Adsorption increases with increase in temperature
c. Adsorption is spontaneous
d. Both enthalpy and entropy of adsorption are negative

13. 11 Problem
The correct order of increasing basic nature for the bases NH3, CH3NH2 and (CH3)2
NH is
a. CH3NH2 < NH3 < (CH3)2NH
b. (CH3)2NH < NH3 < CH3NH2
c. NH3 < CH3NH2 < (CH3)2NH
d. CH3NH2 < (CH3)2 NH < NH3

14. 12 Problem
The solubilities of carbonates decrease down the magnesium group due to a
decrease in
a. Lattice energies of solids
b. Hydration energies of cations
c. Inter-ionic attraction
d. Entropy of solution formation

15. 13 Problem
Nylon threads are made for
a. Polyvinyl polymer
b. Polyester polymer
c. Polymaide polymer
d. Polyethylene polymer

16. 14 Problem
Due to the presence of an unpaired electron free radicals are
a. Cations
b. Anions
c. Chemically inactive
d. Chemically reactive

17. 15 Problem
The highest electrical conductivity of the following aqueous solutions is of
a. 0.1 M difluoroacetic acid
b. 0.1 M fluoroacetic acid
c. 0.1 M chloroacetic acid
d. 0.1 M acetic acid

18. 16 Problem
aluminimum oxide may be electrolysed at 10000C to furnish aluminium metal
(atomic mass = 27 amu; 1 F = 96,500 C). The cathode reaction is : Al3+ + 3e- →Al0
To prepare 5.12 kg of aluminium metal by this method would require
a. 5.49 x 101 C of electricity
b. 5.49 x 104 C of electricity
c. 1.83 x 107 C of electricity
d. 5.49 x 107 C of electricity

19. 17 Problem
Consider the reaction N2 + 3H2 →2NH3 carried out at constant temperature and
pressure. If ∆H and ∆U are the enthalpy and internal energy changes for the
reaction. Which of the following expression is true ?
a. ∆H > ∆U
b. ∆H < ∆U
c. ∆H = ∆U
d. ∆H = 0

20. 18 Problem
The molecular shapes of SF4, CF4 and XeF4 are
a. Different with 1, 0 and 2 lone pairs of electrons on the central atom,
respectively
b. Different with 1, 0 and 2 lone pairs of electrons on the central atom,
respectively
c. The same with 1, 1 and 1 lone pair of electrons on the central atoms,
respectively
d. The same with 2, 0 and 1 lone pairs of electrons on the central atom,
respectively

21. 19 Problem
The lanthanide contraction is responsible for the fact that
a. Zr and Zn have the same oxidation state
b. Zr and Hf have about the same radius
c. Zr and Nb have similar oxidation state
d. Zr and Y have about the same radius

22. 20 Problem
Calomel (Hg2Cl-2) on reaction with ammonium hydroxide gives
a. HgO
b. Hg2O
c. NH2 – Hg – Hg – Cl
d. HgNH2Cl

23. 21 Problem
Alkyl halides react with dialkyl copper reagents to give
a. Alkenyl halides
b. Alkanes
c. Alkyl copper halides
d. Alkenes

24. 22 Problem
Acid catalyzed hydration of alkenes except ethane leads to the formation of
a. Mixture of secondary and tertiary alcohols
b. Mixture of primary and secondary alcohols
c. Secondary or tertiary alcohol
d. Primary alcohol

25. 23 Problem
The structure of diborane (B2H-6) contains
a. Four 2C-2e- bonds and four 3C-2e- bonds
b. two 2C-2e- bonds and two 3C-2e- bonds
c. two 2C-2e- bonds and four 3C-2e- bonds
d. Four 2C-2e- bonds and four 3C-2e- bonds

26. 24 Problem
Reaction of cyclohexanone with dimethylamine in the presence of catalytic
amount of an acid forms a compound of water during the reaction is continuously
removed. The compound formed is generally known as
a. An amine
b. An imine
c. An enamine
d. A Schiff’s base

27. 25 Problem
An organic compound having molecular mass 60 is found to contain C = 20%, H =
6.67% and N = 46.67% while rest is oxygen. On heating it gives NH3 alongwith a
solid residue. The solid residue give violet colour with alkaline copper sulphate
solution. The compound is
a. CH3CH2CONH2
b. (NH2)2CO
c. CH3CONH2
d. CH3NCO

28. 26 Problem
The wavelength of the radiation emitted, when in a hydrogen atom electron falls
from infinity to stationary state 1, would be (Rydberg constant = 1.097 x 107 m-1)
a. 91 nm
b. 192 nm
c. 406 nm
d. 9.1 x 10-8 nm

29. 27 Problem
Which one of the following aqueous solutions will exhibit highest boiling point ?
a. 0.01 M Na2SO4
b. 0.01 M KNO3
c. 0.015 M Urea
d. 0.015 M glucose

30. 28 Problem
Which among the following factors is the most important in making fluorine the
strongest oxidizing agent ?
a. Electron affinity
b. Ionization enthalpy
c. Hydration enthalpy
d. Bond dissociation energy

31. 29 Problem
What is the equilibrium expression for the reaction ?
[P4O10 ]
a. Kc [P4 ][O2 ]5
[P4O10 ]
b. Kc 5[P4 ][O2 ]
c. Kc = [O2]5
1
d. Kc [O2 ]5

32. 30 Problem
In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to
a. Generate heat
b. Create potential difference between the two electrodes
c. Produce high purity water
d. Remove adsorbed oxygen from electrode surfaces

33. 31 Problem
The enthalpies of combustion of carbon and carbon monoxide are –393.5 and –
283 kJ mol-1 respectively. The enthalpy of formation of carbon monoxide per
mole is
a. 110.5 kJ
b. 676.5 kJ
c. -676.5 kJ
d. -110.5 kJ

34. 32 Problem
Which one of the following ores is best concentrated by froth-floatation method
?
a. Magnetite
b. Cassiterite
c. Galena
d. Malachite

35. 33 Problem
Excess of KI reacts with CuSO4 solution and the Na2S2O3 solution is added to it.
Which of the statements is incorrect for this reaction ?
a. Cu2I2 is formed
b. CuI2 is formed
c. Na2S2O3 is oxidized
d. Evolved I2 is reduced

36. 34 Problem
Which one of the following does not have sp2 hybridised carbon ?
a. Acetone
b. Acetic acid
c. Acetonitrile
d. Acetamide

37. 35 Problem
Which of the following will have a meso-isomer also ?
a. 2-chlorobutane
b. 2,3-dichlorobutane
c. 2,3-dichloropentane
d. 2-hydroxypropanoic acid

38. 36 Problem
Among the following compounds, the optically active alkane having lowest
molecular mass is
a. CH3 – CH2 – CH2 – CH3
b.
c.
d.

39. 37 Problem
Consider the acidity of the carboxylic acids
(i) PhCOOH
(ii)o-NO2C6H4COOH
(iii)p-NO2C6H4COOH
(iv)m-NO2C6H4COOH
which of the following order is correct ?
a. (i) > (ii) > (iii) > (iv)
b. (ii) > (iv) > (iii) > (i)
c. (ii) > (iv) > (i) > (iii)
d. (ii) > (iii) > (iv) > (i)

40. 38 Problem
The compound formed on heating chlorobenzene with chloral in the presence of
concentrated sulphuric acid is
a. Gammexane
b. DDT
c. Freon
d. Hexachloroethane

41. 39 Problem
Amogn the following compounds which can be dehydrated very easily ?
a. CH3CH2CH2CH2CH2OH
b.
c.
d.

42. 40 Problem
The smog is essentially caused by the presence of
a. O2 and O3
b. O2 and N2
c. Oxides of sulphur and nitrogen
d. O3 and N2

43. 41 Problem
The radiosiotpe, tritium ( H) has a half-life of 12.3 yr. If the initial amount of
tritium is 32 mg. How many milligrams of it would remain after 49.2 yr ?
a. 4 mg
b. 8 mg
c. 1 mg
d. 2 mg

44. 42 Problem
H .OH
In this reaction CH3CHO + HCN→ CH3CH(OH)CN CH3CH(OH)COOH
An asymmetric centre is generated. The acid obtained would be
a. 50%D + 50% L-isomer
b. 20%D + 80% L-isomer
c. D-isomer
d. L-isomer

45. 43 Problem
Which one of the following octahedral complexes will not show geometrical
isomerism ? (A and B are monodentate ligands)
a. [MA4B2]
b. [MA5B]
c. [MA2B4]
d. [MA3B3]

46. 44 Problem
The method of zone refining of metals is based on the principle of
a. Greater noble character of the solid metal than that of the impurity
b. Greater solubility of the impurity in the molten state than in the solid
c. Greater mobility of the pure metal than that of impurity
d. Higher melting point of the impurity than that of the pure metal

47. 45 Problem
According to IUPAC nomenclature sodium nitrooprusside is named as
a. Sodium pentacyanonitrosyl ferrate (II)
b. Sodium pentacyanonitrosyl ferrate (III)
c. Sodium nitroferricyanide
d. Sodium nitroferrocyanide

48. 46 Problem
Phospholipids are esters of glycerol with
a. One carboxylic acid residue and tow phosphate groups
b. Three phosphate groups
c. Three carboxylic acid residues
d. Two carboxylic acid residues and one phosphate groups

49. 47 Problem
The temperature dependence of rate constant (k) of a chemical reaction is
written in terms of Arrhenius equation, k= Ae-E*/RT. Activation energy (E*) of the
reaction can be calculated by ploting
1
a. log k vs T
1
b. log k vs log T
c. k vs T
1
d. k vs log T

50. 48 Problem
In a set of the given reactions, acetic acid yielded a product C.CH3COOH PCl5 A
C6 H6 C2 H5 MgBr
A anh. AlCl3
B ether
c Product C would be
a. CH3CH(OH)C6H5
b.
c. CH3CH(OH)C2H5
d. CH3COC6H5

51. 49 Problem
The correct order of ionic radii of Y3+, La3+, Eu3+ and Lu3+ is
a. Lu3+ < Eu3+ < La3+ < Y3+
b. La3+ < Eu3+ < Lu3+ < Y3+
c. Y3+ < La3+ < Eu3+ < Lu3+
d. Y3+ < 3Lu3+ < Eu3+ < La3+
(Atomic no. Y= 39, La = 57, Eu= 63, Lu =71)

52. 50 Problem
Which one of the following compounds, is not a protonic acid ?
a. SO(OH)2
b. SO2(OH)2
c. B(OH)3
d. PO(OH)3

53. 51 Problem
Formation of a solution from two components can be considered as
(1) pure solvent → separated solvent molecules, ∆H1
(2) pure solvent → separated solvent molecules, ∆ H2
(3) pure solvent → separated solvent molecules, ∆ H3
solution so formed will be ideal if
a. ∆ Hsoln = ∆ H1 - ∆ H2 - ∆ H3
b. ∆ Hsoln = ∆ H3 - ∆ H2 - ∆ H2
c. ∆ Hsoln = ∆ H1 + ∆ H2 + ∆ H3
d. ∆ Hsoln = ∆ H1 + ∆ H2 - ∆ H3

54. 52 Problem
Among the following, the pair in which the two species are not isostructural, is
a. SiF4 and SF4
b. IO3 and XeO3
c. BH 4 and NH4
d. PF 6 and SF6-

55. 53 Problem
Which one of the following structures represents the peptide chain ?
a.
b.
c.
d.

56. 54 Problem
The maximum number of molecule is present in
a. 15 L of H2 gas at STP
b. 5 L of N2 gas at STP
c. 0.5 g of H2 gas
d. 10 g of O2 gas

57. 55 Problem
A sequence of how many nucleotides in messenger RNA makes a codon for an
amino acid ?
a. Three
b. Four
c. One
d. Two

58. 56 Problem
Ionic radii are
a. Inversely proportional to effective nuclear charge
b. Inversely proportional to square of effective nuclear charge
c. Directly proportional to effective nuclear charge
d. Directly proportional to square of effective nuclear charge

59. 57 Problem
The helical structure of protein is stabilized by
a. Dipeptide bonds
b. Hydrogen bonds
c. Ether bonds
d. Peptide bonds

60. 58 Problem
60
The radioactive isotope 27 Co which is used in the treatment of cancer can be
made by (n, p) reaction. For this reaction the target nucleus is
59
a. 28 Ni
59
b. 27 Co
60
c. 28 Ni
60
d. 27 Co

61. 59 Problem
the work done during the expansion of a gas from a volume of 4 dm3 to 6 dm3
against a constant external pressure of 3 atm, is
a. - 6 J
b. -608 J
c. +304 J
d. -304 J

62. 60 Problem
The mass of carbon anode consumed (giving only carbon dioxide) in the
production of 270 kg of aluminium metal from bauxite by the Hall process is
(Atomic mass of Al = 27)
a. 180 kg
b. 270 kg
c. 540 kg
d. 90 kg

63. 61 Problem
Which one of the following compounds, is most acidic ?
a.
b.
c.
d.

64. 62 Problem
The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The
total vapour pressure of solution obtained by mixing 3 moles of P and 2 moles of
Q would be
a. 140 torr
b. 20 torr
c. 68 torr
d. 72 torr

65. 63 Problem
Which functional group participates in disulphide bond formation in proteins ?
a. Thiolacetone
b. Thiol
c. Thioether
d. Thioester

66. 64 Problem
The energy of second Bohr orbit of the huydrogen atom is –328 kJ mol-1; hence
the energy of fourth Bohr orbit would be
a. -41 kg mol-1
b. -1312 kJ mol-1
c. -164 kJ mol-1
d. -82 kJ mol-1

67. 65 Problem
Which one of the following arrangements represents the correct order of
electron gain enthalpy (with negative sign) of the given atomic species ?
a. Cl < F < S < O
b. O < S < F < Cl
c. S < O < Cl < F
d. F < Cl < O < S

68. 66 Problem
Which of the following is responsible for depletion of the ozone layer in the
upper strata of the atmosphere ?
a. Polyalogens
b. Ferroncenes
c. Fullerenes
d. Freons

69. 67 Problem
What amount of bromine will be required to convert 2 g of phenol into 2, 4, 6-
bribromo phenol ?
a. 20.44 g
b. 6.00 g
c. 4.00 g
d. 10.22 g

70. 68 Problem
Isomers of propionic acid are
a. HCOOC2H5 and CH3COOCH3
b. HCOOC2H5 and C3H7COOH
c. CH3COOCH3 and C3H7OH
d. C3H7OH and CH3COCH3

71. 69 Problem
Metamers of ethyl propionate are
a. C4H9CCOH and HCOOC4H9
b. C4H9COOH and CH3COOC3H7
c. CH3COOCH3 and CH3COOC3H7
d. CH3COOC3H7 and C3H7COOCH3

72. 70 Problem
What is the correct IUPAC name of
a. 4-methoxy-2nitrobenzaldehyde
b. 4-formyl-3-nitro anisole
c. 4-methoxy-6-nitrobenzaldehyde
d. 2-formyl-5-methoxy nitrobenzene

73. 71 Problem
Which of the following is anhydride of perchloric acid ?
a. Cl2O7
b. Cl2O5
c. Cl2O3
d. HClO

74. 72 Problem
The concentration of H2O2 solution of ’10 volume’ is
a. 30%
b. 3%
c. 1%
d. 10%

75. 73 Problem
The dipole moment of HBr is 1.6 x 10-30 cm and inter-atomic spacing is 1 Å. The
% ionic character of HBr is
a. 7
b. 10
c. 15
d. 27

76. 74 Problem
CaC2 + N2 →A, product A is
a. CaCN2
b. CaCN2 and C
c. CaCN2 + N2
d. None of these

77. 75 Problem
The safest and the most common alternative of sugar is
a. Glucose
b. Asparatme
c. Saccharin
d. Cyclodextrin

78. FOR SOLUTIONS VISIT WWW.VASISTA.NET