MH SET 2015: 6 September, Paper III, Chemical Sciences
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Test Booklet No.
M
CHEMICAL SCIENCE
Signature and Name of Invigilator Seat No.
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(Name) ................................................ OMR Sheet No.
AUG - 33315 (To be filled by the Candidate)
Time Allowed : 2½ Hours] [Maximum Marks : 150
Number of Pages in this Booklet : 32 Number of Questions in this Booklet : 75
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AUG - 33315/III
Chemical Science
Paper III
Time Allowed : 2½ Hours] [Maximum Marks : 150
Note : This paper contains Seventy Five (75) multiple choice questions, each
question carrying Two (2) marks. Attempt All questions.
1. The contribution of rotation to heat capacity is :
R
(A) R (B)
2
3R
(C) 2R (D)
2
2. The following Lineweaver-Burk plot is for :
(A) uncompetitive inhibition
(B) competitive inhibition
(C) non-competitive inhibition
(D) mega-competitive inhibition
3 [P.T.O.
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P
3. The quantity lim equals to :
T 0 T V
(A) 1 (B) 1/2
(C) 0 (D) 2
4. The symmetric deformation ( 2) vibration in NO 3 anion is :
(A) IR active, Raman inactive
(B) Raman active, IR inactive
(C) Active in the IR and Raman
(D) Neither observed in IR nor in Raman
5. For the reaction :
Br O 3 a q. 5Br a q. 6H a q. 3Br 2 l 2H 2 O l
the following initial rate laws were obtained :
Set B rO 3
0
Br
0
H
0
R0
1 0.10M 0.10M 0.10M 1
2 0.20M 0.10M 0.10M 2
3 0.20M 0.20M 0.10M 4
4 0.10M 0.10M 0.20M 4
Which of the following rate laws is correct ?
2 1
(A) R = K BrO 3 Br H
1 2
(B) R = K BrO 3 Br H
2 1 1
(C) R = K Br O 3 Br H
1 5 6
(D) R = K BrO 3 Br H
4
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6. The term symbol of Ni2+ ion representing its lowest energy state is :
(A) 3F (B) 3P
(C) 1S (D) 1G
7. For the first order consecutive reaction :
k1 k2
A B C
Rate of change of concentration of [B] with time can be expressed as :
d B
(A) k1 A k2 B
dt
d B
(B) k1 A k2 B
dt
d B
(C) k1 A 0 e k1 t k2 B
dt
d B
(D) k1 A 0 e k2 t k2 B
dt
2
19
8. The degeneracy of the energy level that corresponds to energy of
m a
a particle in a cubic box of length ‘a’ is :
(A) 3 (B) 6
(C) 9 (D) 1
5 [P.T.O.
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9. The reaction between O and O2 is found to be third order. The possible units
for the rate constant is :
(A) cm6 mol–2 s–1 (B) cm–3 mol–1 s–1
(C) (L/molecule)2 s–2 (D) (L/molecule)2 s
10. The rotational constant of CO molecule is 1.8 cm–1. The wave number of incident
radiation in a Raman spectrophotometer is 20487 cm –1. What is the wave
number of second Stokes line ?
(A) 20505 cm–1 (B) 20479 cm–1
(C) 20469 cm–1 (D) None of these
11. Consider the following cells :
Pt/H2(g)/HCl(aq.)/Hg2Cl2(s)/Hg(l)
The EMF at 293 K and 303 K were found to be +0.2699 V and +0.2669 V,
respectively. The change in entropy is :
(A) –38 J K–1 mol–1 (B) –58 J K–1 mol–1
(C) –68 J K–1 mol–1 (D) –48 J K–1 mol–1
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12. The energy of 1 kJ mol–1 equals :
(A) 96.48 cm–1 (B) 27.21 cm–1
(C) 83.59 cm–1 (D) 13.6 cm–1
13. The cell with the following reaction,
Zn(s) + 2H+(aq.) Zn2+(aq.) + H2(g)
An addition of H2SO4 in the Cathode compartment will :
(A) Increase Ecell and shift the equilibrium to the left
(B) Lower Ecell and shift the equilibrium to the right
(C) Increase Ecell and shift the equilibrium to the right
(D) Lower Ecell and shift the equilibrium to the left
14. The matrix for C 2n z operator (rotation angle 2 ) is given by :
cos 2 sin 2 0
C 2n z sin 2 cos 2 0
0 0 x
The value of x is :
(A) 2 (B) 1
(C) cos 2 (D) 0
7 [P.T.O.
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15. An AgNO3 solution containing Ag electrode is connected by means of salt
bridge to PbCl2 solution containing Pb electrode.
Which of the correct representation of Galvanic cell ?
(A) (B)
– – – –
(C) (D)
– – – –
16. Zeta potential or electrokinetic potential depends on :
(A) viscosity
(B) dielectric constant
(C) velocity of colloidal particles when electric field is applied
(D) all three i.e. viscosity, dielectric constant and mobility
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17. The ratio of de Broglie wavelengths of proton to that of deuterium having
the same kinetic energies is :
(A) 2 (B) 1/2
(C) 2 (D) 1 2
18. From the temperature jump method, the relaxation time for the reaction :
k1
A B
k2
is determined to be 10 s. The corresponding equilibrium constant is
10–3. The rate constant for the backward reaction (k2) is :
(A) 105 s–1 (B) 108 s–1
(C) 106 s–1 (D) 103 s–1
19. If the residual entropy of a crystal was observed to be 13.38 J K –1 mol–1
the molecule adopts how many configurations (close lying in energies)
at 0 K :
(A) 3 (B) 5
(C) 6 (D) 2
20. A packet of colloidal system is held stationary by means of membrane.
The two electrodes are immersed in the medium and voltage is applied. The
liquid medium moves under the influence of electric field, this phenomenon
is called :
(A) Tyndal effect (B) Electrophoresis
(C) Electrodialysis (D) Electro-osmosis
9 [P.T.O.
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23. If we ‘hypothetically’ switch of the charges on ions, the chemical potential
expression will take a form :
(A) j j
RT ln a j (B) j j
RT ln x j
(C) j j
RT ln j (D) j
RT ln j
24. The most probable distance of 2 s electron (in Å) in the ground state of H
atom is :
(A) 1.058 (B) 2.116
(C) 0.529 (D) 0.794
25. Cycloheptatrienyl bromide has structure :
Br
This compound is to :
(A) behave like covalent compound and dissolves in non-polar solvents
(B) behave like ionic compound and dissolves in polar solvents like water
(C) behave like coordination compounds
(D) behave like ionic compound but dissolves in non-polar solvent
11 [P.T.O.
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28. Trans-3, 4-dimethylcyclobut-1-ene on heating undergoes ring opening. The
statement which best describes the process is :
(A) Two conrotatory modes are enantiomeric and lead to the same product
(B) Two conrotatory modes of opening are possible but lead to two different
products
(C) Two products corresponding to the two conrotatory modes of opening
are possible but one of them is formed exclusively
(D) The ring opening occurs by disrotatory mode and gives two products
29. Polydispersity index of a polymer is ratio of its :
(A) Weight average molecular weight to number average molecular weight
(B) Number average molecular weight to weight average molecular weight
(C) Weight average molecular weight to viscosity average molecular weight
(D) Weight average molecular weight to sedimentation average molecular
weight
13 [P.T.O.
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h 1
30.
a cet on e
The above reaction is an example of :
(A) Cope rearrangement
(B) [2 + 2] cycloaddition
(C) [4 + 2] cycloaddition
(D) Di-Pi-methane rearrangement
31. In the diacetal (X), protons Ha and Hb are :
(A) Enantiotopic (B) Diastereotopic
(C) Homotopic (D) Heterotopic
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32. Consider four isomeric ketones P, Q, R and S :
Two of these show a peak in the mass spectrum at m/e 86. These are :
(A) P and S (B) Q and R
(C) R and S (D) P and R
33. The correct structure which corresponds to the spectral data given below
is :
IR : 1760 cm–1
PMR : 7.28, dd, 1H; 4.88, dd, 1H; 4.56, dd, 1H, 2.08, s, 3H
CMR : 141.7, d; 96.6, t; 17.4, q; 167.0, s.
(A) (B)
(C) (D)
15 [P.T.O.
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34. In free radical polymerization, the degree of polymerization is :
(A) directly proportional to concentration of initiator used
(B) directly proportional to square root of concentration of initiator used
(C) inversely proportional to concentration of the initiator used
(D) inversely proportional to square root of the concentration of initiator
used
35. The major product in the following reaction, (X) is :
Ac 2 O
H 3P O4 X
(A)
(B)
(C)
(D)
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36. Find out the correct statement :
(A) Pyridine is a weak base and Pyridine-N-oxide is a strong base
(B) Pyridine is a strong base and Pyridine-N-oxide is a strong acid
(C) Pyridine is a weak base and Pyridine-N-oxide is a salt like nature
(neutral in nature)
(D) Both, Pyridine and Pyridine-N-oxides are weak bases
37. The reaction that amino acid undergoes in the living system are :
(A) Trans-amination and Decarboxylation
(B) Trans-esterification and Deamination
(C) Trans-esterification and Decarboxylation
(D) Trans-amination and Dehydration
17 [P.T.O.
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38. The major product of the following reaction is :
+ Bromine water (A)
(B)
(C)
(D)
(A) Only (A)
(B) Only (B)
(C) Only (D)
(D) All of the above products
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39. Aldol reaction if carried out in the strong basic conditions, then it undergoes
elimination path :
(A) of E 1cb elimination (B) of E1 elimination
(C) of E2 elimination (D) of Ei elimination
40. The possible products of the following reaction are :
(A) (x) and (y) only
(B) (x) and (z) only
(C) (y) and (z) only
(D) (x), (y) and (z) all products
19 [P.T.O.
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41. Identify the kind of IPSO substitution product in the following reaction :
(A) X only
(B) Y only
(C) X and Y both
(D) Neither X nor Y but any other
42. Identify the following chemical conversion :
(A) Barton Reaction
(B) Bayer Villiger Reaction
(C) Hofmann Reaction
(D) Hofmann Loffler-Freytag Reaction
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43. Identify the product of reaction of acetone with Hydroxylamine :
CH 3COCH3 + NH2OH ?
(A) Ethanal oxime (B) Ethanol oxime
(C) Ethyl amine (D) No reaction
44. Gilman reagent has one of the following names :
(A) Lithium dimethyl cuperate
(B) Lithium diethyl cuperate
(C) Lithium methyl
(D) Lithium isopropylamide
45. Which of the following statements is not correct for Benzene ?
(A) It is a (4n + 2) = 6 -electron Annulene
(B) It doesn’t represented by a real cyclic structure
(C) It doesn’t show resonance phenomenon
(D) It is entirely different than Annulene skeleton
21 [P.T.O.
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46. The organic reaction occurs when the HOMO of nucleophile overlaps with
the LUMO of electrophile to form :
(A) A new -bond
(B) A new -bond
(C) A new coordinate covalent bond
(D) A new lone pair/non-bonding electron pair
Directions : Linked problem Q. No. 47 and Q. No. 48.
47. Reagents X and Y are respectively :
(A) 25% KOH and 75% H2SO4
(B) 75% H2SO4 and 25% KOH
(C) Pd, H2 and dil. HNO3
(D) dil. HNO3 and Pd, H2
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48. The reaction involved in step 2 in the above sequence is :
(A) Benzilic acid rearrangement
(B) Michael addition
(C) Favorskii reaction
(D) Baeyer-Villiger reaction
49. The gamma rays are produced by :
(A) electronic relaxation
(B) nuclear relaxation
(C) photoelectric effect
(D) both photoelectric effect and electronic relaxation
50. For a particular radioactive sample, the total counting rate was 450 cpm and
the value was obtained over 15.0 minutes counting period. The background
was counted for 2.0 minutes and gave 12 cpm. What is the standard deviation
associated with the corrected counting rate ?
(A) 4.0 (B) 5.0
(C) 6.0 (D) 5.5
23 [P.T.O.
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51. In neutron activation analysis, a neutron is captured by the analyte nucleus
to give an isotope which has :
(A) same atomic number but mass number is greater by one
(B) same atomic number but mass number is less by one
(C) same mass number but atomic number is greater by one
(D) same mass number but atomic number is less by one
52. The number of tetrahedral sites occupied by 2n++ ions in zinc blende is :
(A) 1 (B) 1/2
(C) 2/3 (D) 1/4
53. Which one of the following ions is linear ?
(A) NH 2 (B) NH 4
(C) I3 (D) NO 2
54. Borazine is commonly called as Inorganic benzene, because :
(A) It is isoelectronic with benzene
(B) It appears like benzene
(C) It has same number of bonds with that of benzene
(D) It undergoes similar type of reactions as that of benzene
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55. The common property possessed by CaTiO 3 and LaBa2Cu3O7 is :
(A) Superconductivity (B) Ferroelectric property
(C) Piezoelectric property (D) Common structural features
56. “Actinide hypothesis” was useful in :
(A) elucidating the properties of the heavier actinides
(B) elucidating the properties of lighter actinides
(C) elucidating the properties of the heavier lanthanides and actinides
(D) elucidating the properties of the lighter lanthanides and actinides
57. Pu3+ and lighter actinides have absorption spectra similar to those of
the lanthanides but exhibit broadening identical to transition metal ions,
because of :
(A) greater ligand-metal orbital interaction
(B) smaller ligand-metal orbital interaction
(C) lesser exposure of the 5f orbitals
(D) moderate exposure of the 5f orbitals
25 [P.T.O.
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58. The following combination of metal ion and ligands is preferred and is expected
to lead to the formation of a more stable complex :
(A) Ti4+ and CN– (B) Cu2+ and F–
(C) Co2+ and SCN– (D) Ti4+ and NCS–
4
59. The value of spin only magnetic moment in the complex, Co NO 2 in
6
BM units is :
(A) 0 (B) 1.73
(C) 3.87 (D) 4.9
60. The covalent compounds formed by the combination of two different halogens
are called :
(A) Polyhalide (B) Inter-halogen compound
(C) Pseudo-halogens (D) Halogen compounds
61. Which of the following is true about the number of bands corresponding
to CO in the IR spectra of cis-[M(CO)4Cl2] and trans-[M(CO)4Cl2] ?
(A) The number of bands in both is equal
(B) cis-isomer has more number of bands than the trans
(C) The bands in both isomers appear at the same frequencies
(D) The trans isomer does not have any significant band in the carbonyl
stretching region
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62. The synthetic attempts to obtain transition metal alkyls were failed for many
years, because :
(A) metal-carbon bond is less strong than main group metal-carbon bond
(B) metal-carbon bond is thermodynamically stable
(C) transition metal-alkyls undergo decomposition due to less kinetic stability
(D) metal-carbon bond is not thermodynamically stable
63. Which of the following can act as a reducing agent ?
(A) Fe( 5—C5H5)2 (B) Mn( 5—C5H5)2
(C) Re( 5—C5H5)2 (D) Rh( 5—C5H5)2
64. The reaction of 3-octene with Zr(cp)2HCl (cp = 5—C H ) should yield :
5 5
(A) Zr(cp)2Cl
(B)
(C)
(D) A mixture of B and C
27 [P.T.O.
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65. Fe(COT) (CO)3 (COT = Cyclooctatetraene) is a stable species having a
dynamic proton NMR with a single sharp line at ambient temperatures
becoming broad and splitting into four multiplets at lower temperature. This
indicates that :
(A) COT is bound to Fe as ( 2—COT)
(B) COT is bound to Fe as ( 4—COT)
(C) COT changes the binding mode from 8 at ambient temperature to
2 or 4 at lower temperature
(D) The molecule is fluxional
66. Dissociation mechanism of ligand substitution can be identified by the ligand
field transition generally shifting during the reaction to :
(A) higher energy and negative S
(B) lower energy and positive S
(C) higher energy and positive S
(D) lower energy and negative S
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67. The reaction :
2 2
Rh H 2 O SCN Cr H 2 O
5 6
2 2
Rh H 2 O Cr H 2 O SCN
6 5
is an example of :
(A) Aquation
(B) Ligand exchange
(C) Outer sphere electron transfer
(D) Inner sphere electron transfer
68. In photocatalytic water splitting by ruthenium bipy complexes, (bipy =
2, 2 -bipyridine), the following acts as a reducing species :
2 2 *
(A) Ru bipy 3 (B) Ru bipy 3
3 3 *
(C) Ru bipy 3 (D) Ru bipy 3
69. The geometry of the active site in plastocyanins can be best described as :
(A) Tetrahedral (B) Tetragonal
(C) Square planar (D) Pseudotetrahedral
70. The resting form of the water splitting Mn4 cluster in PS II has :
(A) Cubane type structure and all Mn ions in 2+ oxidation state
(B) Cubane type structure and all Mn ions in 3+ oxidation state
(C) Tetrahedral structure will all Mn ions in 2+ oxidation state
(D) Cyclic structure will all Mn ions in 3+ oxidation state
29 [P.T.O.
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71. The intense colour of [Re2Cl8]2– anion can be attributed to the following :
(A) Ligand field transition (B) * transition
(C) * transition (D) Charge transfer transition
72. Copper (II) and Nickel (II) form complexes of [M(en)x]2+ formulae where
x = 1 – 3. Which of the following is not true about the respective stability
constants ? [en = 1, 2-ethane diamine]
(A) K 2 < K1
(B) K 3 < K2
(C) K1 and K2 in Cu2+ complexes are higher than those in Ni2+ complexes
(D) K3 in Cu2+ complexes is higher than that in Ni2+ complexes
73. In a reversed-phase column, a solute was found to have a retention time of
31.0 min. and an unretained species required 0.5 min. for elution when the
mobile phase was 30% (by volume) methanol and 70% water. What is the
retention factor ?
(A) 61.0 (B) 62.0
(C) 60.0 (D) 54.0
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74. In a hydrogen-oxygen flame, the atomic absorption signal for calcium was
found to decrease in the presence of :
(A) EDTA
(B) 8-hydroxyquinoline
(C) ammonium salt of 1-pyrrolidinecarbodithioic acid
(D) sulphate
75. Styrene-divinyl benzene copolymers, when completely monosulphonated and
in H+-form, consist predominantly of units :
Each unit has the formula weight 184.2 and carries one fixed ionic group.
The theoretical scientific weight capacity of this resin is :
(A) 4.45 meq/g (B) 4.85 meq/g
(C) 5.43 meq/g (D) 4.20 meq/g
31 [P.T.O.
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32Official key not published for this paper.
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Source: Savitribai Phule Pune University. Question paper published by Savitribai Phule Pune University.