Chemical Sciences MODEL Joint CSIR-UGC Test 2009

Chemical Sciences
Paper I(PART ‘B’)
41. Complexes of which of the following metals are used in the treatment of
rheumatoid arthritis:
1. Gold
2. Ruthenium
3. Iron
4. Copper

42. Non-heme iron-sulfur proteins are involved in:
1. Electron transfer.
2. Proton transfer.
3. Both electron and proton transfer
4. Oxygen transfer.

43. Active catalytic species for hydroformylation is
1. RuCl2(PPh3)3
2. HCo(CO)3
3. RhCl(PPh3)3
4. K2PtCl6

44. The unit of molar absorptivity is:
1. L mol–1 cm–1
2. L–1 mol cm–1
3. L mol cm–1
4. L mol cm

45. Gelatin is added during polarographic measurements to:
1. reduce streaming motion of falling mercury drop
2. increase Id
3. increase E1/2
4. eliminate residual current

46. The element that shows both +3 and +4 oxidation states is:
1. Cerium
2. Promethium
3. Gadolinium
4. Holmium

47. The number of 3c, 2e BHB bonds present in B4H10 is
1. 2
2. 3
3. 4
4. 0

48. In BrF3 as a solvent SnF4 and KF behave as
1. acid and base, respectively
2. base and acid, respectively
3. acids
4. bases

49. The effective nuclear charge (Z*) for the 1s electron of 8O according to
Slater’s rules is nearly
1. 4.55
2. 3.45
3. 7.65
4. 5.45


51. CO bond order is lowest in
1. uncoordinated CO
2. CO bonded to one metal
3. CO bridging two metals
4. CO bridging three metals

52. The most unstable species among the following is
1. Ti(C2H5)4
2. Ti(CH2Ph)4
3. Pb(CH3)4
4. Pb(C2H5)4

53. In which of the following species quadrupole bonding is involved?
1. Mo2(NMe2)6
2. Mn2(CO)10
3. Fe2(CO)9
4. Re2Cl8

54. In which one of the following pairs the species have similar geometry?
1. CO2 and SO2
2. NH3 and BH3
3. CO3
2– and SO3
2–
4. SO4
2– and ClO4

55. On oxidative addition of O2 to Ir(CO)Cl(PPh3)2, the oxidation state and
coordination number of Ir changes, respectively, by
1. 1 and 3
2. 2 and 2
3. 3 and 1
4. 2 and 3

56. In linear metal nitrosyls NO acts as a/an:
1. One electron donor
2. Two electron donor
3. Three electron donor
4. Four electron donor

57. Among the following molecules, the dipole moment is the highest for
1. NH3
2. trans-[PtCl2(NH3)2]
3. BF3
4. NF3

58. An element 'X' emits successively two β particles, one α particle, one positron
and one neutron. The mass and atomic numbers of the element are decreased
by, respectively,
1. 4 and 1
2. 5 and 1
3. 3 and 2
4. 3 and 1

59. The 1H NMR spectrum of (η5-C5H5)2Fe recorded at room temperature has
1. One singlet
2. One multiplet
3. Two singlets
4. Two multiplets

60. In the estimation of Fe2+ by Cr2O7
using barium diphenylamine sulfonate as
indicator, H3PO4 is added to
1. maintain the pH of the medium
2. decrease the Fe2+/3+ potential
3. increase the oxidizing power of Cr2O7
4. stabilize the indicator

61. The polymeric species (SN)n is a / an
1. three dimensional conductor
2. two dimensional conductor
3. insulator
4. one dimensional conductor

62. Among feldspar, muscovite mica and zeolite,
1. all are three dimensional silicates
2. feldspar and zeolite are three dimensional, while muscovite mica is
layered
3. feldspar is three dimensional, while zeolite and muscovite mica are
layered
4. all are layered silicates
63. The molar absorptivity at λmax is minimum for
1. [Mn(H2O)6]2+
2. [Cr(H2O)6]2+
3. [Co(H2O)6]2+
4. [Fe(H2O)6]2+
64. The acid catalyzed hydrolysis of trans-[Co(en)2AX]n+ can give cis- product
also due to the formation of
1. square pyramidal intermediate
2. trigonal bipyramidal intermediate
3. pentagonal bipyramidal intermediate
4. face capped octahedral intermediate
65. The total number of lines expected in 1H NMR spectrum of HPF2 is (I = 1/2
for both 19F and 31P)
1. six
2. four
3. five
4. three
66. In the inner sphere reduction of [Co(NH3)5Cl]2+ with [Cr(OH2)6)]2+, the
chloride
1. bridges the metal centres only
2. mediates electron transfer only
3. bridges and mediates electron transfer both
4. does not play any role
67. The number of faces and edges in IF7 polyhedron are, respectively
1. 15 and 15
2. 10 and 15
3. 10 and 10
4. 15 and 10
68. Among N2, 3 N− , azobenzene and hydrazine, the shortest and longest N–N
distances are found, respectively, in
1. 3 N− and hydrozine
2. N2 and azobenzene
3. 3 N− and azobenzene
4. N2 and hydrazine
69. O2 can be converted to 2 O+ by using
1. PtF6
2. KF
3. Na2S2O3
4. Br2
70. Only one absorption band is observed in visible region of spectrum of
1. [Ni(H2O)6]2+
2. [Ti(H2O)6]3+
3. [Fe(CN)6]4–
4. 3-
4 VO
71. CFSE of transition metal complexes can be determined by
1. UV-visible spectroscopy
2. IR spectroscopy
3. Microwave spectroscopy
4. NMR spectroscopy
72. Which two among [Fe(CN)6]3–, [FeF6]3–, [Cu(bpy)2]2+ (bpy = 2,2'-bipyridine)
and [Mn(acac)3] (acac = acetylacetonate anion) show the same spin-only
magnetic moment?
1. [Fe(CN)6]3– and [FeF6]3–
2. [Fe(CN)6]3– and [Cu(bpy)2]2+
3. [FeF6]3–
and [Mn(acac)3]
4. [Cu(bpy)2]2+ and [Mn(acac)3]
73. In aqueous medium a mixture of KI and I2 converts thiosulfate to
1. S4O6
2–
2. SO4
2–
3. S2O6
2–
4. S2O4
2–
74. An exothermic reaction will necessarily follow the condition
1. ΔΗ < 0
2. ΔΗ > 0
3. ΔΗ = 0
4. ΔS= 0
75. The unit of rate constant (k) for a zero-order reaction is
1. s-1
2. L mol-1 s-1
3. s
4. mol L-1 s-1
76. Heating is observed when N2 gas at 200 atm is expanded at T > 600 K. It is
because
1. inversion temperature is smaller than 600 K
2. N2 is a real gas
3. Joule-Thomson coefficient is negative
4. Joule-Thomson coefficient is positive
77. Increase in disorder is more if
1. heat is absorbed reversibly at higher temperature
2. heat is absorbed reversibly at lower temperature
3. heat absorbed reversibly is independent of temperature
4. heat absorbed reversibly is independent of phase of the system.
78. The term symbol of Li+2 with configuration (1σg)2(1σu)2(2σg)1 is
1. Σ+
g
1
2. Σ−
g
1
3. Σ−
g
2
4. Σ+
g
2
79. Which one of the following equations is used for the calculation of
equilibrium constant (K) of an electrochemical cell reaction (n = number of
electrons transferred, F = Faraday constant and E° = standard redox potential)?
1. lnK = (nFEo / RT)
2. lnK = −(nFEo / RT)
3. lnK = (RT / nFEo )
4. lnK = −(RT / nFEo )
80. Cubic close packing of n spheres generates the following number of interstitial
sites
1. 2n octahedral and n tetrahedral sites
2. n octahedral and n tetrahedral sites
3. 2n octahedral and 2n tetrahedral sites
4. n octahedral and 2n tetrahedral sites
81. The point group symmetry of the molecule CH2Cl2 is
1. C2h
2. C2v
3. D2h
4. D2d
82. The point group symmetries of isosceles and equilateral triangles respectively
are
1. C3v and D2d
2. D3h and D2d
3. D3h and C2v
4. C3v and C2v
83. The infrared spectrum of CO2 exhibits the following number of absorptions:
1. one
2. two
3. three
4. four
84. The first line in the rotational Raman spectra of a diatomic molecule appears
with a Stokes shift of 12 cm–1. The Stokes shift for the second line is
1. 36 cm–1
2. 24 cm–1
3. 18 cm–1
4. 20 cm–1
85. Which of the following molecules shows EPR resonance?
1. H2O
2. O2
3. H2O2
4. CO2
86. The R branch in the vibrational spectra of AX exhibits a set of equally spaced
lines with a separation of 10 cm–1. The rotational constant of AX is
1. 10 cm–1
2. 20 cm–1
3. 5 cm–1
4. 15 cm–1
87. Overtones are observed in the vibrational spectra of diatomic molecules when
1. anharmonicity is large
2. anharmonicity is absent
3. vibration and rotational modes are coupled
4. an alternating electric field is applied
88. Which of the following electronic transitions is disallowed?
1. π → π∗
2. σ → σ∗
3. n → π∗
4. δ → δ∗
89. If the Carnot cycle in entropy-temperature diagram looks as below,
T D C
A B
S
then the system rejects heat to the surroundings in going from
1. B → A
2. A → B
3. D → C
4. C → D
90. The correlation coefficient ρ(x, y) for two variables x and y satisfies
1. –1 ≤ ρ(x, y) ≤ 1
2. –1 < ρ(x, y) < 1
3. 0 ≤ ρ(x, y) ≤ 1
4. 0 < ρ(x, y) < 1
91. When we introduce anharmonicity in the harmonic vibrator model of a
diatomic molecule, the energy-level spacing changes from
1. equal to gradually decreasing
2. gradually decreasing to equal
3. equal to gradually increasing
4. gradually increasing to equal
92. For a one-electron atom with nuclear charge Z, the speed vn of the electron in
some n-th stationary orbit satisfies
1. vn ∝ Z
2. vn ∝ Z
2
3. vn ∝ Z
–1
4. vn ∝ Z
–2
93. The optimized variational wavefunction gives
1. all properties and energy of same quality
2. properties better than the energy
3. energy better than properties
4. equal kinetic and potential energy values
94. The commutator [Ly, Lx] has a value equal to
1. zero
2. –iLZ
3. –iηLZ
4. –ηLZ
95. The following statement is true for any hermitian operator:
1. All eigenvalues are real and non-degenerate
2. All eigenfunctions are real
3. All eigenfunctions are complex
4. All eigenvalues are real
96. A δ molecular orbital of a diatomic molecule is defined by
1. n = 3
2. ℓ = 2
3. λ = 2
4. m ℓ = 2
97. The 2px hydrogenic orbital has the ф-part in its wavefunction of the form
1. e–iφ
2. e+iφ
3. sin φ
4. cos φ
98. Which of the following statements about valence bond (VB) and molecular
orbital (MO) theory is false?
1. The VB uses non-orthogonal basis.
2. The simple MO theory does not include any ionic terms.
3. The VB theory views molecules as composed of atomic cores and
bonding valence electrons.
4. The MOs can be delocalized over all the atoms.
99. If Aˆ an operator and
dx
d i Aˆ ψ
ψ η = , then 2 Aˆ ψ is given by
1.
2
2 ⎟⎠
⎞
⎜⎝
− ⎛
dx
dψ
η
2. 2
2
2
dx
d ψ
− η
3.
2
2 ⎟⎠
⎞
⎜⎝
⎛
dx
dψ
η
4. 2
2
2
dx
d ψ
η
100. If all the energy-levels of a system are given a constant shift by an amount α,
the entropy of the system
1. does not change at all
2. changes by the amount of α
3. decreases
4. increases, but irregularly
101. An equimolar mixture of two macromolecules of molar masses 10,000 and
30,000 will have the number average molar mass equal to:
1. n M = 10,000
2. n M = 15,000
3. n M = 20,000
4. n M = 25,000
102. Addition of a positive catalyst to an exothermic reaction
1. increases exothermicity and activation barrier
2. decreases exothermicity, but increases barrier
3. increases exothermicity only
4. decreases activation barrier, but does not change the exothermicity.
103. The electrical conductivity of a crystalline solid increases with temperature.
The solid is a
1. superconductor
2. metal
3. semiconductor
4. semimetal
104. Ksp values for CuS, FeS, PbS and ZnS are 8.5 × 10–45, 6.3 × 10–18, 3.4 × 10–28
and 1.6 × 10–24, respectively. If H2S gas is passed through a solution
containing these ions with same molar concentration, the ion that will
precipitate first is
1. Pb2+
2. Zn2+
3. Fe2+
4. Cu2+
105. The experimental adsorption data of a gas on a solid surface at temperature T
exhibits the following variation with pressure. V is the volume of gas
adsorbed.
1/V
1/P
Which of the following statements is true?
1. Heat of coverage varies linearly with temperature
2. Adsorption is multilayer
3. Heat of adsorption is independent of coverage
4. Complete coverage cannot be determined
106. The second order Bragg diffraction from the 100 planes of a cubic crystal is
equivalent to
1. the second order diffraction from the 200 planes
2. first order diffraction from the 200 planes
3. first order diffraction from the 400 planes
4. first order diffraction from the 100 planes
107. IUPAC name of the compound given below is
COOH
1. 4-methylcyclohex-4-enecarboxylic acid
2. 4-methylcyclohex-3-enecarboxylic acid
3. 1-methylcyclohexene-4-carboxylic acid
4. 2-methylcyclohexene-5-carboxylic acid
108. The major product formed in the reaction given below is
1.
2.
3.
4.
CHO
i. NH2OH
ii. P2O5
NC
NHCHO
CONH2
CN
109. Cope rearrangement involves
1. [1,5]-sigmatropic rearrangement
2. [4+2]-cycloaddition reaction
3. [3,3]-sigmatropic rearrangement
4. 6π-electrocyclisation reaction
110. The major product formed in the reaction given below is
1.
2.
3.
4.
O
Cl
NH2NH2
KOH
Cl
O
NHNH2
COOH
111. The stereochemical descriptors for the chiral centre and olefin in the
compound given below, are
O
Me
HO H
H
2
4
1. 4R, 2Z
2. 4S, 2Z
3. 4R, 2E
4. 4S, 2E
112. In the compound given below, the hydrogens HA and HB are
OH
HA
HB
1. homotopic
2. enantiotopic
3. diastereotopic
4. isotopic
113. An organic compound with molecular formula C3H6Cl2 exhibits only one
signal in the 1H NMR spectrum. The compound is
1. 2,2-dichloropropane
2. 1,2-dichloropropane
3. 1,3-dichloropropane
4. 1,1-dichloropropane
114. The order of λmax in the UV-Vis spectra for the compounds A-C is
A B C
1. A > B > C
2. B > A > C
3. B > C > A
4. C > B > A
115. The photochemical Paterno-Büchi reaction is a cycloaddition between
1. two >C=C< groups
2. a >C=O and >C=C< groups
3. a >C=N-R and >C=C< groups
4. a >C=S and >C=C< groups
116. The reaction given below is an example of
O
O
O
+
O
O
O
Δ
1. π4s + π2s cycloaddition
2. π4s + π2a cycloaddition
3. π4a + π2s cycloaddition
4. π4a + π2a cycloaddition
117. Which one among the dienes A-D will undergo [3,3]-sigmatropic shift upon
heating
A B C D
1. A
2. B
3. C
4. D
118. The LUMO of the ground state buta-1,3-diene is
1.
2.
3.
4.
119. The major product formed in the reaction given below is
1.
2.
3.
4.
OH OTs EtOH / Δ
OTs
O
OTs
CHO
120. The transformation given below can be achieved using
O
1. BH3.THF followed by H2O2 / NaOH
2. alkaline KMnO4 / NaIO4
3. pyridinium chlorochromate
4. PdCl2 / CuCl2 / O2 / H2O
121. The base peak in the electron impact mass spectrum (EI MS) of acetophenone
is
1. 120
2. 105
3. 77
4. 65
122. In the reaction given below, the orientation of two bromine substituents in the
product is
Br2
Br
Br
1
2
1. equatorial at both C-1 and C-2
2. equatorial at C-1 and axial at C-2
3. axial at C-1 and equatorial at C-2
4. axial at both C-1 and C-2
123. Cyclohexyl benzyl ether is converted to cyclohexanol using
1. 5% aq. KOH
2. hydrazine hydrate
3. H2-Pd/C
4. tetrabutylammonium fluoride
124. Which one among the compounds A-D will have highest dipole moment?
A B C D
C C
1. A
2. B
3. C
4. D
125. The major products formed in the nitration (HNO3 / H2SO4) of aniline and
acetanilide are
1. o-nitroaniline and o-nitroacetanilide
2. m-nitroaniline and p-nitroacetanilide
3. p-nitroaniline and m-nitroacetanilide
4. m-nitroaniline and m-nitroacetanilide
126. Which one of the following name reactions is an example of atom economy
reaction?
1. Wittig reaction
2. Grignard reaction
3. Dieckmann condensation
4. Diels-Alder reaction
127. The order of nucleophilicity among PhNH2, EtNH2 and PhNHNH2 is
1. PhNHNH2 > PhNH2 > EtNH2
2. EtNH2 > PhNH2 > PhNHNH2
3. PhNHNH2 > EtNH2 > PhNH2
4. EtNH2 > PhNHNH2 > PhNH2
128. The order of acid strengths of CH3COOH, CF3COOH and CCl3COOH is
1. CCl3COOH > CF3COOH > CH3COOH
2. CCl3COOH > CH3COOH > CF3COOH
3. CF3COOH > CCl3COOH > CH3COOH
4. CF3COOH > CH3COOH > CCl3COOH
129. The major product formed in the reaction given below is
1.
2.
3.
4.
i. ozonolysis
Me
Me ii. NaOH
O
O
Me
O
O
130. The most suitable reagent to achieve the transformation, given below, is
OH
HO
O
HO
1. CrO3 / H2SO4
2. MnO2
3. KMnO4 / H+
4. RuCl3 / NaIO4
131. An optically active compound A having molecular formula C6H12 on catalytic
hydrogenation gives an optically inactive compound (C6H14). The compound
A is
1. 2-methylpentene
2. 3-methylpentene
3. 3,3-dimethylbutene
4. 4-methylpentene
132. The reagent suitable for converting oct-4-yne to trans-oct-4-ene is
1. H2 – Pd/C
2. Pd / CaCO3 / H2
3. NaBH4
4. Na / liq. NH3
133. Which one of the following is a polar aprotic solvent?
1. toluene
2. carbon tetrachloride
3. N,N-dimethylformamide
4. acetic acid
134. The major product formed in the reaction, given below, is
1.
2.
3.
4.
PCl5
N
OH
MeO Cl
NH
Cl
O
OMe
NH
MeO
O
Cl
NH
Cl
O
Cl
NH
MeO
O
OMe
135. The major product formed in the reaction, given below, is
1.
2.
3.
4.
i. EtMgBr
ii. H3O+
CN
CHO
O
NH2
CN
136. The most suitable reagent for carrying out the transformation given below, is
Me Me
OH
1. aq. H2SO4
2. Hg(OAc)2 followed by reaction with NaBH4 / NaOH
3. B2H6 followed by reaction with H2O2 / NaOH
4. m-CPBA followed by reaction with dil H2SO4
137. Natural product abietic acid, given below, is a
COOH
1. monoterpene
2. sesquiterpene
3. diterpene
4. triterpene
138. The major product formed in the reaction of ethyl acetoacetate with sodium
hydride (1 equivalent) and methyl iodide (1 equivalent) is
1.
2.
3.
4.
O O
OEt
O O
OEt
Me
Me
MeO O
OEt
O O
139. The reaction of phenylacetylene with one equivalent of methylmagnesium
bromide followed by reaction with benzaldehyde provides
1.
2.
3.
4.
Ph
Ph
OH
Ph
Ph Me
OH
Ph
Me H
Ph
HO
Ph Me
H
140. Sucrose is a disaccharide consisting of
1. glucose and glucose
2. glucose and galactose
3. glucose and fructose
4. glucose and mannose