MH SET 2013: 1 December, Paper II, Chemical Sciences
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Chemical Sciences
Paper II
Time Allowed : 75 Minutes] [Maximum Marks : 100
Note : This Paper contains Fifty (50) multiple choice questions. Each question
carries Two (2) marks. Attempt All questions.
1. Which of the folloiwng is not a Lewis 3. For the concentration cell
Ag|Ag+ (aq., 0.01 mol dm–3) || Ag+
base ?
(aq, 0.1 mol dm–3)|Ag
the EMF of the cell, E at a
(A) CN–
temperature T equals :
(B) C2H5OH RT
(A) 2.303
F
(C) AlCl3 RT
(B) − 2.303
F
(D) (CH3)3N 0 RT
(C) EAg+ , Ag + 2.303
F
2. The bond orders of the O2 , O2+ and 0 RT
(D) EAg+ , Ag − 2.303
F
O−2 are respectively : 4. The pH of a 1.0 × 10–3 mol dm–3
solution of a weak acid HA is
(A) 2.5, 2.0, 1.5
4.0. The dissociation constant of the
acid is :
(B) 2.0, 2.5, 1.5
(A) 1.0 × 10–3
(C) 2.0, 1.5, 2.5 (B) 1.0 × 10–4
(C) 1.0 × 10–5
(D) 2.0, 2.5, 2.5 (D) 2.0 × 10–5
3 [P.T.O.
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5. The point groups of 1, 2-dichloro- 8. Which of the following molecules
benzene, 1, 3-dichlorobenzene does not possess a centre of
symmetry ?
and 1, 4-dichlorobenzene are
respectively : (A) trans-dichloroethene
(B) naphthalene
(A) C2V, C2V, D2h
(C) eclipsed ethane
(B) D2h, D2h, C2V
(D) staggered ethane
(C) C2h, C2h, D2h
9. An ideal gas in a thermally
(D) C2V, D2h, C2V insulated vessel expands, quickly
6. The term symbol for a particular against vacuum. For this
process :
state of an atom is 3D3. The values
of L, S and J for this term are (A) the temperature remains
constant
respectively :
(B) a finite, non-zero amount of work
(A) 3, 1, 3
is done by the gas
(B) 2, 1, 3 (C) heat flows into the gas
(C) 2, 0, 3 (D) intermolecular interactions
decrease upon expansion
(D) 3, 2, 3
10. Standard enthalpies of formation
7. Given that the standard potentials
(in kJ mol–1) of four compounds
of the Cu2+/Cu and Cu+/Cu couples A, B, C and D are – 200, – 50,
are + 0.340 V and 0.522 V + 10 and – 100 respectively. For the
respectively, the standard potential reaction : A + 2C = 3B + 4D. The
of Cu2+/Cu+ couple is : standard enthalpy of reaction, in
kJ mol–1, is :
(A) 0.182 V
(A) 40
(B) 0.862 V
(B) 0
(C) + 0.158 V (C) –340
(D) – 0.158 V (D) –370
4
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11. The efficiency of a reversible heat
13. The reaction A + B → P is first
engine, operating between absolute
temperatures of T1 and T2 (where
order with respect to each of
T2 < T1) is :
T1 the two reactants. a 0 , b 0 are
(A) 1 + T
2
T1 the initial concentrations of A and
(B) 1 − T
2
T2 B, respectively. x is the
(C) 1 −
T1
T2 concentration of P at time t. The
(D) 1 + T
1
12. The osmotic pressure (π) of a solution appropriate rate equation for this
of a polymer with molecular weight
of M is recorded at different reaction is :
concentrations (C, in gl–1) of the
1 b0 (a0 − x)
polymer and at different absolute (A) k = t(a − b ) ln a (b − x)
0 0 0 0
temperatures (T). The plot of π/C
1 b0 (a0 − x)
against T is a straight line, in (B) k = t(2a − b ) ln a (b − x)
0 0 0 0
which :
(A) The intercept is R/M 1 b0 (a0 − x)
(C) k = t(2a − b ) ln a (b − x)
0 0 0 0
(B) The intercept is M/R
(C) The slope is M/R 1 b0 (a0 − x)
(D) k = ln
t a0 (b0 − x)
(D) The slope is R/M
5 [P.T.O.
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14. k is the rate constant of a reaction
15. A catalyst lowers the energy of
and T is the absolute temperature.
the :
The correct plot among the following
is : (A) reactant
(B) product
(A) ln k (C) transition state
(D) intermediate
16. A solid, MX, is formed of a metal ion
T
M + and a halide ion X – . The
following data are available :
(B) k Process ∆H/kJ mol –1
Decomposition of MX(g) + 500
Ionization of M(g) + 400
1/T
Sublimation of M(s) + 100
1
ln k Dissociation of X2(g) + 150
2
(C)
Electron attachment to X(g) – 400
The lattice energy for MX
1/T (in kJ mol–1) is :
(A) 1150
(D) k (B) 750
(C) –1150
(D) –750
T
6
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18. The following compound, is :
17. The correct IUPAC nomenclature
CH2OH
of the following compound
HO H
is :
OH HO H
CHO
OH
(A) optically inactive and belongs to
D-family
(A) (2S, 3R)—5—Phenylpentane-
(B) optically active and belongs to
D-family
2, 3-diol
(C) optically active and belongs to
(B) (3S, 4R)—1—Phenylpentane- L-family
(D) optically inactive and belongs to
3, 4-diol
L-family
(C) (2R, 3S)—5—Phenylpentane- 19. The number of stereoisomers of
2, 3, 4-trichloropentane is :
2, 3-diol
(A) 2
(D) (3R, 4S)—1—Phenylpentane- (B) 6
(C) 8
3, 4-diol
(D) 4
7 [P.T.O.
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20. The correct Fischer projection repre- 21. The number of stereoisomers of
sentation of the following compound (H 3 C) 2 C = CH—CH = CH—
H OH CH(OH)COOH is :
COOH
(A) 4
H3C (B) 2
HO H
is : (C) 6
(D) 8
COOH
22. The major product of the following
HO H reaction is :
(A)
HO H + NaNO2 + HCl
N
CH3 H
COOH is :
H OH
(B)
HO H (A) N
NO
CH3
COOH
(B) NO
HO H N
(C) H
H OH
CH3 (C)
N
COOH H
NO
H OH
(D) NO
H OH
(D)
N
CH3 H
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23. The major product of the following 24. Addition of an ester enolate to the
carbonyl carbon of another ester
reaction is :
gives :
AcONO2 (A) diester
?
–5 to –30°C (B) an anhydride
O (C) α, β-unsaturated ester
NO2 (D) β-keto ester
(A) 25. Among the following reducing
agents the one that can be used
NO2 O under acidic conditions is :
NO2 (A) NaBH4
(B) (B) NaCNBH3
(C) LiAlH4
O
(D) DIBAL
26. Which of the following
(C) rearrangements does not proceed
NO2
O through a nitrene intermediate ?
NO2 (A) Beckmann
(B) Curtius
(D)
NO2 (C) Lossen
O
(D) Schmidt
9 [P.T.O.
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28. Which is the major product in the
27. The major product (Z) of the
following reaction ?
O O
following reaction is : || || (1) NaOEt, EtOH2
OEt (2) n-Butyl bromide
COOH +
(3) H3O , ∆
+ CH3CH2CH2OH
O O
Conc. H2SO4 || ||
Z
∆ (A)
COOH
O
(A) ||
(B)
COOH O
||
(B)
(C)
O O
|| ||
C
OEt
COOH (D)
29. Robinson annulation involves :
(C)
(A) Two aldol condensation steps
(B) Two Michael addition steps
COOCH2CH2CH3 (C) Aldol condensation followed by
(D) Michael addition
(D) Michael addition followed by
aldol condensation
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31.
30. Among the following, the compound
that shows carbonyl stretching at O
highest wave numbers in IR O O
O
spectroscopy is :
Y Z
(A) The number of signals that
appear in 13 C NMR spectra of
O
||
O compounds Y and Z respectively
||
(B)
are :
O
|| (A) 5, 5
O
(C)
(B) 3, 4
O
||
(C) 4, 5
(D) NH
(D) 5, 4
11 [P.T.O.
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32. Identify the compound that displays 34. The acidic character in the following
the following signals in the 1H-NMR hydroxides of trivalent cations
spectrum : δ 1.21 (t, 3H), 2.2 (s, 3H), changes as :
3.6 (q, 3H), 4.2 (s, 2H) : (A) Al(OH)3 > B(OH)3 > Tl(OH)3 >
Fe(OH)3
O (B) B(OH)3 > Tl(OH)3 > Al(OH)3 >
|| O
(A) Fe(OH)3
H 3C CH2 CH2CH3
(C) Tl(OH)3 > Fe(OH)3 > Al(OH)3
> B(OH)3
(D) B(OH)3 > Al(OH)3 > Fe(OH)3 >
(B)
Tl(OH)3 >
35. According to VSEPR theory, the
shape of XeOF4 is predicted to
be :
(C) (A) Octahedral
(B) Trigonal bipyramidal
(C) Square pyramidal
(D)
(D) distorted octahedral
36. The spin moment of a system
can be calculated using the
33. Which of the following molecules expression :
has the highest bond order ?
(A) [S(S + 1)]1/2
(A) CO
(B) NO (B) [2S(S + 2)]1/2
(C) O2 (C) [4S(S + 1)]1/2
(D) Cl 2 (D) [n(n + 1)]1/2
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37. Which of the following complex ions 40. The complex ion with CFSE equal
to – 12 Dq is :
has magnetic moment value same
(A) [Fe(CN)6]4–
as [Ti(H2O)6]3+ ?
(B) [Ni(H2O)6]2+
(A) [Mn(CN)6]4–
(C) [Mn(H2O)6]2+
(B) [Fe(H2O)6]2+
(D) [Co(H2O)6]2+
(C) [Co(NH3)6]2+ 41. Which of the following is ESR
active ?
(D) [Ni(H2O)6]2+
(A) [Fe(CN)6]4–
38. Which of the following is a
(B) [Co(CN)6]3–
Mossbauer active nucleus ?
(C) [Ni(CN)4]2–
(A) 2D
(D) [Cu(CN)4]2–
(B) 12 C 42. The term symbol for the ground state
in V2+ ion is :
(C) 78Se
(A) 4D3/2
(D) 119Sn
(B) 3F 9/2
39. Which of the following orbitals is
(C) 4F 3/2
most destabilized in trigonal
(D) 4D9/2
bipyramidal geometry ?
43. The hybridization involved in TiCl4
(A) dxz is :
(A) sp3
(B) dxy
(B) dsp2
(C) dx 2 – y2
(C) sd3
(D) dz2
(D) sp3d
13 [P.T.O.
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44. The total number of isomers 47. The oxidation of oxalate with
possessed by trans- permanganate in basic solution
Na3[Co(OX)2Cl(SCN)] is : involves the change in oxidation
(A) 1 state of manganese from :
(A) Mn7+ to Mn2+
(B) 2
(B) Mn7+ to Mn4+
(C) 3
(C) Mn4+ to Mn2+
(D) 4 (D) Mn4+ to Mn0
45. Which of the following molecules 48. Fe+ and NO+ can be classified,
has a Cn axis and n number of C2 respectively, as :
axes ? (A) soft acid and soft base
(A) SO2Cl2 (B) hard acid and hard base
(C) soft acid and hard base
(B) B(OH)3
(D) hard acid and soft base
(C) NH3
49. Which of the following can act as an
(D) PCl3 oxidizing agent ?
46. The colour change of a pH indicator (A) [Mn(η5—C5H5)2]
used for a volumetric experiment (B) [Fe(η5—C5H5)2]
requires an overtitration of 0.03 ml. (C) [Co(η5—C5H5)2]
If the required volume of titrant is (D) [Fe(η5—C5H5)(CO)3]
25.0 ml, the percent relative error 50. Which of the following carbonyl
in the measurement will be : clusters should possess bridging
(A) + 0.12% carbonyls ?
(B) + 0.06% (A) [Os3(CO)12]
(B) [Co4(CO)12]
(C) + 0.03%
(C) [Ir4(CO)12]
(D) – 0.03%
(D) [Os4(CO)16]
14
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ROUGH WORK
15 [P.T.O.
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ROUGH WORK
16Official key not published for this paper.
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Source: Savitribai Phule Pune University. Question paper published by Savitribai Phule Pune University.