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Chemical Sciences
Paper I(PART ‘B’)
41.
Complexes of which of the following metals are used in the treatment of
rheumatoid arthritis:
1.
2.
3.
4.
42.
Non-heme iron-sulfur proteins are involved in:
1.
2.
3.
4.
43.
L mol–1 cm–1
L–1 mol cm–1
L mol cm–1
L mol cm
Gelatin is added during polarographic measurements to:
1.
2.
3.
4.
46.
RuCl2(PPh3)3
HCo(CO)3
RhCl(PPh3)3
K2PtCl6
The unit of molar absorptivity is:
1.
2.
3.
4.
45.
Electron transfer.
Proton transfer.
Both electron and proton transfer
Oxygen transfer.
Active catalytic species for hydroformylation is
1.
2.
3.
4.
44.
Gold
Ruthenium
Iron
Copper
reduce streaming motion of falling mercury drop
increase Id
increase E1/2
eliminate residual current
The element that shows both +3 and +4 oxidation states is:
1.
2.
3.
4.
Cerium
Promethium
Gadolinium
Holmium
47.
The number of 3c, 2e BHB bonds present in B4H10 is
1.
2.
3.
4.
48.
In BrF3 as a solvent SnF4 and KF behave as
1.
2.
3.
4.
49.
O 2 + < O2 < O 2 –
O 2 – < O2 < O 2 +
O 2– < O 2+ < O2
O 2 + < O2 – < O 2
CO bond order is lowest in
1.
2.
3.
4.
52.
4.55
3.45
7.65
5.45
Among the species O2+, O2 and O2–, the order of first ionization energy is
1.
2.
3.
4.
51.
acid and base, respectively
base and acid, respectively
acids
bases
The effective nuclear charge (Z*) for the 1s electron of 8O according to
Slater’s rules is nearly
1.
2.
3.
4.
50.
2
3
4
0
uncoordinated CO
CO bonded to one metal
CO bridging two metals
CO bridging three metals
The most unstable species among the following is
1.
2.
3.
4.
Ti(C2H5)4
Ti(CH2Ph)4
Pb(CH3)4
Pb(C2H5)4
53.
In which of the following species quadrupole bonding is involved?
1.
2.
3.
4.
54.
In which one of the following pairs the species have similar geometry?
1.
2.
3.
4.
55.
One electron donor
Two electron donor
Three electron donor
Four electron donor
Among the following molecules, the dipole moment is the highest for
1.
2.
3.
4.
58.
1 and 3
2 and 2
3 and 1
2 and 3
In linear metal nitrosyls NO acts as a/an:
1.
2.
3.
4.
57.
CO2 and SO2
NH3 and BH3
CO32– and SO32–
SO42– and ClO4–
On oxidative addition of O2 to Ir(CO)Cl(PPh3)2, the oxidation state and
coordination number of Ir changes, respectively, by
1.
2.
3.
4.
56.
Mo2(NMe2)6
Mn2(CO)10
Fe2(CO)9
Re2Cl82-
NH3
trans-[PtCl2(NH3)2]
BF3
NF3
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.
2.
3.
4.
4 and 1
5 and 1
3 and 2
3 and 1
59.
The 1H NMR spectrum of (η5-C5H5)2Fe recorded at room temperature has
1.
2.
3.
4.
60.
In the estimation of Fe2+ by Cr2O72– using barium diphenylamine sulfonate as
indicator, H3PO4 is added to
1.
2.
3.
4.
61.
3.
4.
all are three dimensional silicates
feldspar and zeolite are three dimensional, while muscovite mica is
layered
feldspar is three dimensional, while zeolite and muscovite mica are
layered
all are layered silicates
The molar absorptivity at λmax is minimum for
1.
2.
3.
4.
64.
three dimensional conductor
two dimensional conductor
insulator
one dimensional conductor
Among feldspar, muscovite mica and zeolite,
1.
2.
63.
maintain the pH of the medium
decrease the Fe2+/3+ potential
increase the oxidizing power of Cr2O72–
stabilize the indicator
The polymeric species (SN)n is a / an
1.
2.
3.
4.
62.
One singlet
One multiplet
Two singlets
Two multiplets
[Mn(H2O)6]2+
[Cr(H2O)6]2+
[Co(H2O)6]2+
[Fe(H2O)6]2+
The acid catalyzed hydrolysis of trans-[Co(en)2AX]n+ can give cis- product
also due to the formation of
1.
2.
3.
4.
square pyramidal intermediate
trigonal bipyramidal intermediate
pentagonal bipyramidal intermediate
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.
2.
3.
4.
66.
In the inner sphere reduction of [Co(NH3)5Cl]2+ with [Cr(OH2)6)]2+, the
chloride
1.
2.
3.
4.
67.
N 3− and hydrozine
N2 and azobenzene
N 3− and azobenzene
N2 and hydrazine
O2 can be converted to O +2 by using
1.
2.
3.
4.
70.
15 and 15
10 and 15
10 and 10
15 and 10
Among N2, N 3− , azobenzene and hydrazine, the shortest and longest N–N
distances are found, respectively, in
1.
2.
3.
4.
69.
bridges the metal centres only
mediates electron transfer only
bridges and mediates electron transfer both
does not play any role
The number of faces and edges in IF7 polyhedron are, respectively
1.
2.
3.
4.
68.
six
four
five
three
PtF6
KF
Na2S2O3
Br2
Only one absorption band is observed in visible region of spectrum of
1.
2.
3.
4.
[Ni(H2O)6]2+
[Ti(H2O)6]3+
[Fe(CN)6]4–
VO3-4
71.
CFSE of transition metal complexes can be determined by
1.
2.
3.
4.
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.
2.
3.
4.
73.
∆Η < 0
∆Η > 0
∆Η = 0
∆S = 0
The unit of rate constant (k) for a zero-order reaction is
1.
2.
3.
4.
76.
S4O62–
SO42–
S2O62–
S2O42–
An exothermic reaction will necessarily follow the condition
1.
2.
3.
4.
75.
[Fe(CN)6]3– and [FeF6]3–
[Fe(CN)6]3– and [Cu(bpy)2]2+
[FeF6]3– and [Mn(acac)3]
[Cu(bpy)2]2+ and [Mn(acac)3]
In aqueous medium a mixture of KI and I2 converts thiosulfate to
1.
2.
3.
4.
74.
UV-visible spectroscopy
IR spectroscopy
Microwave spectroscopy
NMR spectroscopy
s-1
L mol-1 s-1
s
mol L-1 s-1
Heating is observed when N2 gas at 200 atm is expanded at T > 600 K. It is
because
1.
2.
3.
4.
inversion temperature is smaller than 600 K
N2 is a real gas
Joule-Thomson coefficient is negative
Joule-Thomson coefficient is positive
77.
Increase in disorder is more if
1.
2.
3.
4.
78.
The term symbol of Li +2 with configuration (1σg)2(1σu)2(2σg)1 is
1.
2.
3.
4.
79.
2.
3.
4.
+
1
∑
−
2
2
g
g
∑
∑
−
g
+
g
ln K
ln K
ln K
ln K
= (nFE o / RT )
= − (nFE o / RT )
= ( RT / nFE o )
= − ( RT / nFE o )
2n octahedral and n tetrahedral sites
n octahedral and n tetrahedral sites
2n octahedral and 2n tetrahedral sites
n octahedral and 2n tetrahedral sites
The point group symmetry of the molecule CH2Cl2 is
1.
2.
3.
4.
82.
∑
Cubic close packing of n spheres generates the following number of interstitial
sites
1.
2.
3.
4.
81.
1
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.
80.
heat is absorbed reversibly at higher temperature
heat is absorbed reversibly at lower temperature
heat absorbed reversibly is independent of temperature
heat absorbed reversibly is independent of phase of the system.
C2h
C2v
D2h
D2d
The point group symmetries of isosceles and equilateral triangles respectively
are
1.
2.
3.
4.
C3v and D2d
D3h and D2d
D3h and C2v
C3v and C2v
83.
The infrared spectrum of CO2 exhibits the following number of absorptions:
1.
2.
3.
4.
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.
2.
3.
4.
85.
10 cm–1
20 cm–1
5 cm–1
15 cm–1
Overtones are observed in the vibrational spectra of diatomic molecules when
1.
2.
3.
4.
88.
H 2O
O2
H2O2
CO2
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.
2.
3.
4.
87.
36 cm–1
24 cm–1
18 cm–1
20 cm–1
Which of the following molecules shows EPR resonance?
1.
2.
3.
4.
86.
one
two
three
four
anharmonicity is large
anharmonicity is absent
vibration and rotational modes are coupled
an alternating electric field is applied
Which of the following electronic transitions is disallowed?
1.
2.
3.
4.
π → π∗
σ → σ∗
n → π∗
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.
2.
3.
4.
90.
The correlation coefficient ρ(x, y) for two variables x and y satisfies
1.
2.
3.
4.
91.
equal to gradually decreasing
gradually decreasing to equal
equal to gradually increasing
gradually increasing to equal
For a one-electron atom with nuclear charge Z, the speed vn of the electron in
some n-th stationary orbit satisfies
1.
2.
3.
4.
93.
–1 ≤ ρ(x, y) ≤ 1
–1 < ρ(x, y) < 1
0 ≤ ρ(x, y) ≤ 1
0 < ρ(x, y) < 1
When we introduce anharmonicity in the harmonic vibrator model of a
diatomic molecule, the energy-level spacing changes from
1.
2.
3.
4.
92.
B→A
A→B
D→C
C→D
vn ∝
vn ∝
vn ∝
vn ∝
Z
Z2
Z –1
Z –2
The optimized variational wavefunction gives
1.
2.
3.
4.
all properties and energy of same quality
properties better than the energy
energy better than properties
equal kinetic and potential energy values
94.
The commutator [Ly, Lx] has a value equal to
1.
2.
3.
4.
95.
The following statement is true for any hermitian operator:
1.
2.
3.
4.
96.
n=3
ℓ=2
λ=2
mℓ=2
The 2px hydrogenic orbital has the ф-part in its wavefunction of the form
1.
2.
3.
4.
98.
All eigenvalues are real and non-degenerate
All eigenfunctions are real
All eigenfunctions are complex
All eigenvalues are real
A δ molecular orbital of a diatomic molecule is defined by
1.
2.
3.
4.
97.
zero
–iLZ
–iηLZ
–ηLZ
e–iφ
e+iφ
sin φ
cos φ
Which of the following statements about valence bond (VB) and molecular
orbital (MO) theory is false?
1.
2.
3.
4.
The VB uses non-orthogonal basis.
The simple MO theory does not include any ionic terms.
The VB theory views molecules as composed of atomic cores and
bonding valence electrons.
The MOs can be delocalized over all the atoms.
99.
If  an operator and Âψ = iη
1.
2.
3.
4.
100.
102.
2
2
does not change at all
changes by the amount of α
decreases
increases, but irregularly
An equimolar mixture of two macromolecules of molar masses 10,000 and
30,000 will have the number average molar mass equal to:
1.
M n = 10,000
2.
M n = 15,000
3.
M n = 20,000
4.
M n = 25,000
Addition of a positive catalyst to an exothermic reaction
1.
2.
3.
4.
103.
⎛ dψ ⎞
η ⎜
⎟
⎝ dx ⎠
d 2ψ
η2 2
dx
2
If all the energy-levels of a system are given a constant shift by an amount α,
the entropy of the system
1.
2.
3.
4.
101.
⎛ dψ ⎞
− η2 ⎜
⎟
⎝ dx ⎠
d 2ψ
− η2 2
dx
dψ
, then  2 ψ is given by
dx
increases exothermicity and activation barrier
decreases exothermicity, but increases barrier
increases exothermicity only
decreases activation barrier, but does not change the exothermicity.
The electrical conductivity of a crystalline solid increases with temperature.
The solid is a
1.
2.
3.
4.
superconductor
metal
semiconductor
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.
2.
3.
4.
105.
Pb2+
Zn2+
Fe2+
Cu2+
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.
2.
3.
4.
106.
The second order Bragg diffraction from the 100 planes of a cubic crystal is
equivalent to
1.
2.
3.
4.
107.
Heat of coverage varies linearly with temperature
Adsorption is multilayer
Heat of adsorption is independent of coverage
Complete coverage cannot be determined
the second order diffraction from the 200 planes
first order diffraction from the 200 planes
first order diffraction from the 400 planes
first order diffraction from the 100 planes
IUPAC name of the compound given below is
COOH
1.
2.
3.
4.
4-methylcyclohex-4-enecarboxylic acid
4-methylcyclohex-3-enecarboxylic acid
1-methylcyclohexene-4-carboxylic acid
2-methylcyclohexene-5-carboxylic acid
108.
The major product formed in the reaction given below is
i. NH2OH
CHO
1.
NC
2.
NHCHO
CONH2
3.
4.
109.
CN
Cope rearrangement involves
1.
2.
3.
4.
110.
ii. P2O5
[1,5]-sigmatropic rearrangement
[4+2]-cycloaddition reaction
[3,3]-sigmatropic rearrangement
6π-electrocyclisation reaction
The major product formed in the reaction given below is
O
Cl
NH2NH2
KOH
Cl
1.
2.
O
3.
NHNH2
COOH
4.
111.
The stereochemical descriptors for the chiral centre and olefin in the
compound given below, are
O
2
H
HO
1.
2.
3.
4.
112.
Me
4
H
4R, 2Z
4S, 2Z
4R, 2E
4S, 2E
In the compound given below, the hydrogens HA and HB are
HA
HB
OH
1.
2.
3.
4.
113.
An organic compound with molecular formula C3H6Cl2 exhibits only one
signal in the 1H NMR spectrum. The compound is
1.
2.
3.
4.
114.
homotopic
enantiotopic
diastereotopic
isotopic
2,2-dichloropropane
1,2-dichloropropane
1,3-dichloropropane
1,1-dichloropropane
The order of λmax in the UV-Vis spectra for the compounds A-C is
A
1.
2.
3.
4.
115.
B
C
A>B>C
B>A>C
B>C>A
C>B>A
The photochemical Paterno-Büchi reaction is a cycloaddition between
1.
2.
3.
4.
two >C=C< groups
a >C=O and >C=C< groups
a >C=N-R and >C=C< groups
a >C=S and >C=C< groups
116.
The reaction given below is an example of
O
+
O
O
∆
O
O
1.
2.
3.
4.
117.
π4s
+ π2s cycloaddition
4
π s + π2a cycloaddition
π4a + π2s cycloaddition
π4a + π2a cycloaddition
Which one among the dienes A-D will undergo [3,3]-sigmatropic shift upon
heating
A
1.
2.
3.
4.
118.
O
B
C
A
B
C
D
The LUMO of the ground state buta-1,3-diene is
1.
2.
3.
4.
D
119.
The major product formed in the reaction given below is
OH
1.
EtOH / ∆
OTs
2.
O
3.
OTs
CHO
4.
120.
OTs
The transformation given below can be achieved using
O
1.
2.
3.
4.
121.
The base peak in the electron impact mass spectrum (EI MS) of acetophenone
is
1.
2.
3.
4.
122.
BH3.THF followed by H2O2 / NaOH
alkaline KMnO4 / NaIO4
pyridinium chlorochromate
PdCl2 / CuCl2 / O2 / H2O
120
105
77
65
In the reaction given below, the orientation of two bromine substituents in the
product is
Br2
Br
1
2
Br
1.
2.
3.
4.
equatorial at both C-1 and C-2
equatorial at C-1 and axial at C-2
axial at C-1 and equatorial at C-2
axial at both C-1 and C-2
123.
Cyclohexyl benzyl ether is converted to cyclohexanol using
1.
2.
3.
4.
124.
5% aq. KOH
hydrazine hydrate
H2-Pd/C
tetrabutylammonium fluoride
Which one among the compounds A-D will have highest dipole moment?
C C
A
1.
2.
3.
4.
125.
A
B
C
D
o-nitroaniline and o-nitroacetanilide
m-nitroaniline and p-nitroacetanilide
p-nitroaniline and m-nitroacetanilide
m-nitroaniline and m-nitroacetanilide
Wittig reaction
Grignard reaction
Dieckmann condensation
Diels-Alder reaction
The order of nucleophilicity among PhNH2, EtNH2 and PhNHNH2 is
1.
2.
3.
4.
128.
D
Which one of the following name reactions is an example of atom economy
reaction?
1.
2.
3.
4.
127.
C
The major products formed in the nitration (HNO3 / H2SO4) of aniline and
acetanilide are
1.
2.
3.
4.
126.
B
PhNHNH2 > PhNH2 > EtNH2
EtNH2 > PhNH2 > PhNHNH2
PhNHNH2 > EtNH2 > PhNH2
EtNH2 > PhNHNH2 > PhNH2
The order of acid strengths of CH3COOH, CF3COOH and CCl3COOH is
1.
2.
3.
4.
CCl3COOH > CF3COOH > CH3COOH
CCl3COOH > CH3COOH > CF3COOH
CF3COOH > CCl3COOH > CH3COOH
CF3COOH > CH3COOH > CCl3COOH
129.
The major product formed in the reaction given below is
Me
i. ozonolysis
ii. NaOH
Me
O
1.
O
2.
Me
3.
4.
130.
O
O
The most suitable reagent to achieve the transformation, given below, is
OH
O
HO
1.
2.
3.
4.
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.
3.
4.
132.
HO
CrO3 / H2SO4
MnO2
KMnO4 / H+
RuCl3 / NaIO4
2-methylpentene
3-methylpentene
3,3-dimethylbutene
4-methylpentene
The reagent suitable for converting oct-4-yne to trans-oct-4-ene is
1.
2.
3.
4.
H2 – Pd/C
Pd / CaCO3 / H2
NaBH4
Na / liq. NH3
133.
Which one of the following is a polar aprotic solvent?
134.
1.
toluene
2.
carbon tetrachloride
N,N-dimethylformamide
3.
4.
acetic acid
The major product formed in the reaction, given below, is
N
OH
PCl5
Cl
MeO
O
NH
1.
Cl
O
OMe
NH
2.
MeO
Cl
O
NH
3.
Cl
Cl
O
NH
4.
135.
MeO
OMe
The major product formed in the reaction, given below, is
CN
i. EtMgBr
ii. H3O+
1.
2.
3.
CHO
O
NH2
CN
4.
136.
The most suitable reagent for carrying out the transformation given below, is
OH
Me
1.
2.
3.
4.
137.
Me
aq. H2SO4
Hg(OAc)2 followed by reaction with NaBH4 / NaOH
B2H6 followed by reaction with H2O2 / NaOH
m-CPBA followed by reaction with dil H2SO4
Natural product abietic acid, given below, is a
COOH
1.
2.
3.
4.
138.
monoterpene
sesquiterpene
diterpene
triterpene
The major product formed in the reaction of ethyl acetoacetate with sodium
hydride (1 equivalent) and methyl iodide (1 equivalent) is
O
O
1.
OEt
Me
2.
O
O
Me
OEt
3.
MeO
O
OEt
O
4.
O
139.
The reaction of phenylacetylene with one equivalent of methylmagnesium
bromide followed by reaction with benzaldehyde provides
1.
OH
Ph
OH
2.
Me
Ph
Ph
3.
Ph
Me
H
H
Ph
Ph
HO
4.
140.
Ph
Me
Sucrose is a disaccharide consisting of
1.
2.
3.
4.
glucose and glucose
glucose and galactose
glucose and fructose
glucose and mannose