MH SET 2011: 7 August, Paper II, Chemical Sciences
Text of page 1
AUG - 33211/II
Chemical Sciences
Paper II
Time Allowed : 75 Minutes] [Maximum Marks : 100
Note : This Paper contains Fifty (50) multiple choice questions, each question
carrying Two (2) marks. Attempt All questions.
1. The de Broglie wavelength of an 4. The bond angles in H2O are :
electron in a Bohr orbit with radius
(A) <109°
r and quantum number n is
proportional to : (B) 109°
(A) nr (C) 120°
(B) 1/nr (D) 180°
(C) n/r 5. Under what condition is the free
(D) r/n energy a criterion for spontaneity ?
2. Which of the following conditions is (A) Isolated system
not essential for an eigenfunction of
(B) Constant pressure and
the Hamiltonian operator to be an
temperature
acceptable wavefunction ?
(C) Constant pressure and volume
(A) Continuous
(B) Normalized (D) Constant volume and
temperature
(C) Always positive
6. What is the unit of the
(D) Single valued
thermodynamic equilibrium
3. The lowest energy MO of HF is close
constant for a reaction ?
to the energy of the :
(A) Unit of pressure
(A) 1s orbital of H
(B) Unit of volume
(B) 1s orbital of F
(C) 2s orbital of F (C) It is a unitless quantity
(D) 2p orbital of F (D) Depends on the stoichiometry
1 [P.T.O.
Text of page 2
AUG - 33211/II
7. The relationship from which an 9. The rate of a reaction is found to
decrease with increase in
expression for elevation of boiling
temperature. Which of the following
point of a solution can be derived
inferences can be made from this
is : observation ?
K2 ∆H0 1 1 (A) Arrhenius equation is wrong
(A) ln =− −
K1 R T1 T2
(B) The reaction consists of multiple
steps
K2 ∆G0 1 1
(B) ln =− −
K1 R T1 T2 (C) The reaction is of zeroth order
K2 ∆E0 1 1 (D) There is an error in
(C) ln =− −
K1 R T1 T2 measurement
10. The unit of the rate constant for a
K2 ∆S0 1 1
(D) ln =− −
R T1 T2
first order reaction is :
K1
(A) s–1
8. Which of the following solutions will
(B) dm–3 mol s–1
have pH close to 1 ?
(C) dm–3 mol–1 s–1
(A) 100 mL of 0.1 M HCl + 100 mL
(D) dm–3/2 mol1/2 s–1
of 0.1 M NaOH
11. The mean activity coefficient of
(B) 75.0 mL of 0.2 M HCl + 25.0
5.0 × 10–3 mol kg–1 aqueous KCl at
mL of 0.1 M NaOH 25°C is (given A = 0.509) :
(C) 55.0 mL of 0.1 M HCl + 45.0 (A) 0.92
mL of 0.1 M NaOH (B) 0.97
(D) 10.0 mL of 0.1 M HCl + 90.0 (C) 0.85
mL of 0.1 M NaOH (D) 0.87
2
Text of page 3
AUG - 33211/II
12. The major axis of symmetry of a 15. On the basis of the following
molecule is 6 and it has nC2 axes information for the reaction,
perpendicular to this axis. The value 4 2
Al + O2 → Al O
of n is : 3 3 2 3
(A) 1 ∆G = –827 kJ . mol–1
The minimum EMF to be applied for
(B) 2 the electrolysis of Al2O3 is :
(C) 3 (A) 8.56 V
(B) 6.42 V
(D) 6
(C) 4.28 V
13. The co-ordination number of a (D) 2.14 V
cation, in an ionic solid in which the 16. What are the values of the mean
arrangement of the anions around and median of the following six
it is cubic, is : burette readings ?
19.4, 19.5, 19.6, 19.8, 20.1, 20.3
(A) 4
(A) 19.7, 19.7
(B) 6 (B) 19.8, 19.6
(C) 8 (C) 19.8, 19.7
(D) 19.7, 19.8
(D) 10
17. IUPAC name of the following
14. In the rotational spectra of diatomic compound is :
molecules, the spacing between
successive lines is equal to :
h
(A)
4 π2Ic
h
(B) 2 2
4 π Ic
h
(C) (A) Cis-bicyclo[3.3.0]decane
4 π2Ic2
(B) Trans bicyclo[4.4.0]decane
4h (C) Cis-bicyclo[2.2.0]decane
(D)
π2Ic (D) Cis-bicyclo[4.4.0]decane
3 [P.T.O.
Text of page 4
AUG - 33211/II
18. Correct IUPAC nomenclature of the
following compound is : 21. The order of decreasing priority
according to Cahn-Ingold-Prelog
rule is :
(A) HC≡C— > H 2 C=CH— >
(A) (4E)-4-methylhept-4-ene-2-yne O=CH— > —CH3
(B) (4Z)-4-methylhept-4-ene-2-yne
(B) O=CH— > HC≡C— >
(C) (4E)-4-ene-4-methylhept-2-yne
H2C=CH— > —CH3
(D) (4Z)-4-ene-4-methylhept-2-yne
19. The one isomer of 1, 2, 3, 4, 5, (C) —CH3 > HC≡C— > O=CH— >
6-hexachlorocyclohexane which
does not undergo elimination with H2C=CH—
mineral base is having :
(D) H2C=CH— > O=CH— > —CH3
(A) One chlorine is equatorial and
others axial > HC≡C—
(B) All chlorines are equatorial
22. In Lossen rearrangement, the
(C) All chlorines are axial
(D) One chlorine is axial and others reagents used are :
equatorial
(A) (i) NaN3 (ii) CHCl3/∆ (iii) H2O
20. Compound A has six chiral centers.
The number of distereomers for
(B) (i) HN3 (ii) H2SO4 (iii) H2O
compound A is :
(A) 64 (C) (i) hydrazine (ii) HNO 2 (iii)
(B) 63
Benzene/∆ (iv) H2O
(C) 62
(D) 60 (D) (i) NH2OH (ii) NaOH/∆ (iii) H2O
4
Text of page 5
AUG - 33211/II
23. Acyl azide is the precursor in :
25. The following reaction is an
(A) Curtius and Schmidt
rearrangement example of :
(B) Schmidt and Lossen
rearrangement (
Al OCHMe2 )3
→
(C) Only Curtius rearrangement Isopropanol
(D) Curtius and Lossen
rearrangement
Sodium silicate
24. HCHO + CH3CHO →
300°C
H2C=CH—CHO
(A) Above reaction is an Aldol
(A) Meerwein-Ponndorf-Verley
reaction in which acetaldehyde
is an electrophile.
reduction
(B) Above reaction is a Perkin
reaction where formaldehyde is
a nucleophile.
(B) Oppenauer oxidation
(C) Above reaction is an Aldol
reaction in which formaldehyde
is an electrophile. (C) Wolf-Kishner reduction
(D) Above reaction is a Perkin
reaction where acetaldehyde is
(D) Clemmenson reduction
a nucleophile.
5 [P.T.O.
Text of page 6
AUG - 33211/II
26. Reaction of anisole with Li/liq.NH3,
27. Reaction of PhMgBr with dry ice
followed by heating with H 3O +
(CO2) followed by acid hydrolysis
gives :
gives :
O
(A) Benzaldehyde
(A)
(B) Benzene
O (C) Benzoic acid
(B) (D) Phenol
28. Addition of HBr to 1-phenylpropene
O
in the presence of peroxide gives :
(C)
(A) 2-Bromo-2-phenylpropane
(B) 1-Bromo-1-phenylpropane
(C) 2-Bromo-3-phenylpropane
(D)
(D) 2-Bromo-1-phenylpropane
6
Text of page 7
AUG - 33211/II
29. The products formed in the following 32. A compound shows M + 1 peak with
reaction are :
9.997% intensity. Therefore, the
(i) O3 number of carbons in the molecular
H3C—CH=CH2 →
(ii) Zn, H2O ?
formula is :
(A) 2 moles of acetaldehyde (A) 10
(B) 2 moles of formaldehyde
(B) 09
(C) 1 mole of acetaldehyde and
(C) 08
1 mole of formaldehyde
(D) 11
(D) 1 mole of acetone and 1 mole
of formaldehyde 33. Azurin is a copper containing
30. Dehydrohalogenation of erythro-1- electron transfer protein whose
bromo-1, 2-diphenylpropane under bright blue colour disappears on
E2 conditions gives : reduction of metal centre. The origin
of blue colour of azurin is :
(A) Z-1, 2-diphenyl-1-propene
(B) E-1, 2-diphenyl-1-propene (A) LMCT transitions
(C) Trans-1, 2-diphenyl-1-propene (B) MLCT transitions
(D) Trans-1, 2-diphenyl-1-butene (C) n – π* transitions
31. If 1H NMR operating frequency is (D) intra-ligand transitions
500 MHz; the corresponding
34. In biology iron-sulfur proteins are
operating frequency for 13C nuclei
involved in :
will be :
(A) proton transfer
(A) 100 MHz
(B) electron transfer
(B) 75 MHz
(C) 250 MHz (C) atom transfer
(D) 125 MHz (D) oxygen transfer
7 [P.T.O.
Text of page 8
AUG - 33211/II
35. Compound X, which is soluble in
water forms a white precipitate Y 38. The observed 1H chemical shift for
on reaction with aqueous AgNO3.
Y is soluble in ammonia but ferrocene in a 200 MHz instrument
insoluble in dilute nitric acid. On
addition of K2CrO4 to X, a yellow is 4.04 ppm. When the spectrum is
precipitate is formed. Compounds X
and Y are : recorded in 400 MHz instrument, the
(A) K3PO4, AgCl chemical shift will be :
(B) KCl, AgCl
(C) BaCl2, AgCl (A) 4.04
(D) BaCO3, AgCl
(B) 2.02
36. Which one of the following
compounds is practically insoluble in
water ? (C) 8.08
(A) CaCl2
(D) 1.01
(B) CaF 2
(C) MgI 2 39. The conversion of methanol to acetic
(D) BaCl2
acid is catalysed by :
37. The molar absorptivity of a coloured
compound :
+
(A) Rh (CO )2 I2
(A) decreases with increasing
concentration
2−
(B) Rh (CO)2 I 2
(B) remains constant at all
wavelengths
−
(C) Rh (CO )2 I2
(C) is independent of concentration
(D) changes linearly with
(D) Rh (CO)2 I 2
concentration
8
Text of page 9
AUG - 33211/II
40. Frenkel defects are usually observed 42. [(NH 3)4Rh(µ-OH)2Rh(NO2)4] and
[(NH 3 ) 2 (NO 2 ) 2 Rh(µ-OH) 2 (NH 3 ) 2
in : (NO2)2] are examples of :
(A) NaCl (A) ionization isomers
(B) coordination isomers
(B) KCl
(C) linkage isomers
(C) KBr (D) hydrate isomers
(D) AgBr 43. Among the following ions which
one has the highest magnetic
41. Identify the series with correct moment ?
3+
order of stability of the complexes
(
(A) Cr H2O
6
)
(en = ethylenediamine, trien =
2+
triethylenetetramine) : (
(B) Fe H2O
6
)
(A) [Cu(en)2]Cl2 > [Cu2(en)2](NO3)2 2+
(
(C) Cu H2O
6
)
> [Cu(en)2]SO4
2+
(B) [Cu(trien)]Cl2 > [Cu(en)2]Cl2 >
(
(D) Zn H2O
6
)
[Cu(NH3)4]Cl2 44. The ground state value of J for 3F
term for V3+ is :
(C) [Ag(NH3)2]Cl > [Au(NH3)4]Cl >
(A) 0
[Cu(NH3)4]Cl
(B) 1
(D) [Cr(en)2]Cl2 > [Cu(en)2]Cl2 > (C) 2
[Zn(en)2]Cl2 (D) 4
9 [P.T.O.
Text of page 10
AUG - 33211/II
45. The H-A-H bond angle in the 48. pH of the buffer solution of 0.2M
following hydrides with general
CH3COONa and 0.1M CH3COOH
formula AH3 follows the order :
(Ka = 10–5) is :
(A) AsH3 > PH3 > NH3
(A) 5.30
(B) PH3 > AsH3 > NH3
(B) 0.53
(C) NH3 > AsH3 > PH3
(D) NH3 > PH3 > AsH3 (C) 1.53
46. Both NF3 and NCl3 are covalent but (D) 2.53
they do not undergo hydrolysis
49. Which of the following metal ions
similarly because :
can form bent metallocene ?
(A) NF3 is more stable than NCl3
(A) Zr2+
(B) Dipole moment of NF3 is more
than NCl3 (B) Fe2+
(C) Electronegativity of F is greater
(C) Ru2+
than Cl
(D) Co2+
(D) Cl can expand its octet by using
d-orbitals 50. Which of the following will form
47. In which of the following bonds does clathrates ?
H carry δ-ve charge ?
(A) K
(A) F-H
(B) He
(B) O-H
(C) Kr
(C) B-H
(D) N-H (D) Ca
10
Text of page 11
AUG - 33211/II
ROUGH WORK
11 [P.T.O.
Text of page 12
AUG - 33211/II
ROUGH WORK
12Official key not published for this paper.
Page 1 of 12
Source: Savitribai Phule Pune University. Question paper published by Savitribai Phule Pune University.