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CODE-D2
KCET - 2015 TEST PAPER WITH ANSWER KEY
(HELD ON WEDNESDAY 13
th
MAY, 2015)
CHEMISTRY
6.
On heating potassium permanganate, one of the
1.
Number of possible alkynes with formula
C
H
is
5
8
following compound is not obtained :
(1) 4
(2) 2
(1)
MnO
(2)
O
(3) 5
(4) 3
2
2
Ans:
(4)
(3)
K
MnO
(4) MnO
2
4
2.
Glycogen is
Ans:
(4)
(1) structurally very much similar to amylopectin
7.
The salt which responds to dilute and concentrated
(2) a polymer of
E
-D-glucose units
H
SO
is
2
4
(3) structurally similar to amylopectin but extensively
(1)
Na
SO
(2)
CaF
branched
2
4
2
(4) a structural polysaccharide
(3)
Na
PO
(4)
Ba(NO
)
3
4
3
2
Ans:
(3)
Ans:
(4)
3.
How many ions per molecule are produced in the
8.
Half life period of a first order reaction is 10 min.
solution when Mohr salt is dissolved in excess of
Starting with initial concentration 12 M. the rate after
water?
20 min is
(1) 6
(2) 4
(1) 0.0693
u
3 M min
-1
(2) 0.0693 M min
-1
(3) 10
(4) 5
(3) 0.0693
u
4 M min
-1
(4) 0.693
u
3 M min
-1
Ans:
(4)
Ans:
(1)
4.
Which of the following curve is in accordance with
9.
Which of the following aqueous solution has the
Freundlich adsorption isotherm?
highest freezing point ?
(1) 0.1 M NaC
l
(2) 0.1 M Sucrose
(3) 0.01 M
Na
SO
(4) 0.01 M NaC
l
2
4
Ans:
(4)
(1)
(2)
10.
0.30 g of an organic compound containing C, H and
log p
p
Oxygen on combustion yields 0.44 g
CO
and 0.18 g
2
H
O
. If one mol of compound weighs 60, then
2
molecular formula of the compound is
(1)
C
H
O
(2)
CH
O
4
6
2
(3)
(4)
(3)
C
H
O
(4)
C
H
O
log p
p
2
4
2
3
8
Ans:
(3)
Ans:
(1)
11. For one of the element various successive ionization
dryether
H
2
O
1
5.
Br Mg
o
A
o
B.
enthalpies (in kJ
mol
) are given below :
H
The product ‘B’ is
(1)
(2)
OH
1810
14,820
(3)
OH
(4)
MgBr
The element is
(1) A
l
(2) Si
Ans:
(1)
(3) Mg
(4) P
Ans:
(1)
1 / 6
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CODE-D2
12. The aqueous solution of following salt will have the
20. The arrangement of following compounds :
lowest pH :
i.
bromomethane
(1)
NaC
l
O
(2)
NaC
l
O
ii.
bromoform
2
3
iii. chloromethane
(3)
NaC
l
O
(4)
NaC
l
O
4
iv. dibromomethane
Ans:
(3)
In the increasing order of their boiling point is
13. One of the following is an essential amino acid.
(1) ii < iii < i < iv
(1) Isoleucine
(2) Tyrosine
(2) iii < i < iv < ii
(3) Serine
(4) Cysteine
(3) i < ii < iii < iv
Ans:
(1)
(4) iv < iii < i < ii
14. The formation of cyanohydrin from a ketone is an
Ans:
(2)
example of
21. The complex ion having minimum magnitude of
(1) Electrophilic addition
'
(CFSE) is
(2) Nucleophilic substitution
0
(3) Electrophilic substitution
3
(1)
¬
Co C
l
¼
6
(4) Nucleophilic addition
3
Ans:
(4)
(2)
¬
Cr CN
¼
6
15.
100 cm
3
of 1 M CH
3
COOH was mixed with 100 cm
3
of 2 M CH
3
OH to form an ester. The change in the
3
(3)
¬
Cr H
O
¼
2
6
initial rate if each solution is diluted with equal volume
of water would be
3
(4)
¬
Co NH
¼
(1) 0.5 times
(2) 2 times
3
6
(3) 0.25 times
(4) 4 times
Ans:
(1)
Ans:
(3)
22. Which of the following colloids cannot be easily
16. How many Coulombs of electricity are required for
coagulated ?
the oxidation of one mol of water to dioxygen?
(1) Macromolecular colloids
(1) 1.93
u
10
5
C
(2) 9.65
u
10
4
C
(2) Lyophobic colloids
(3) 19.3
u
10
5
C
(4) 1.93
u
10
4
C
(3) Irreversible colloids
Ans:
(1)
(4) Multimolecular colloids
17. Cheilosis and digestive disorders are due to the
Ans:
(1)
deficiency of
23. After adding non-volatile solute freezing point of
(1) Riboflavin
(2) Thiamine
water decreases to -0.186 °C. Calculate
'
T
if
b
(3) Pyridoxine
(4) Ascorbic acid
K
1.86
K kg mol
-1
and
K
= 0.521 K kg mol
-1
f
b
Ans:
(1)
(1) 1.86
(2) 0.521
18. One of the following amide will not undergo Hoffmann
(3) 0.0186
(4) 0.0521
bromamide reaction :
Ans:
(4)
(1)
C
H
CONH
(2)
CH
CONH
6
5
2
3
2
24. Which of the following compound of Xenon has
(3)
CH
CH
CONH
(4)
CH
CONHCH
pyramidal geometry ?
3
2
2
3
3
Ans:
(4)
(1)
XeO
(2)
XeOF
3
4
19. lodoform can be prepared from all, except
(3)
XeF
(4)
XeF
4
2
(1) propan-l-ol
(2) propan-2-ol
Ans:
(1)
(3) acetophenone
(4) butan-2-one
Ans:
(1)
2 / 6
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CODE-D2
25. Cryolite is
29. Plot of Maxwell’s distribution of velocities is given
below :
(1)
Na
A
l
F
and is used in the electrolysis of
3
6
alumina for lowering the melting point and
increasing the conductivity of alumina.
f
2
T
2
(2)
Na
A
l
F
and is used in the electrolysis of
3
6
f
1
T
alumina for decreasing electrical conductivity.
(3)
Na
A
l
F
and is used in the electrolytic refining
3
6
of alumina.
V
V
1
(4)
Na
A
l
F
and is used in the electrolysis of
3
6
Molecular Velocity
alumina for lowering the melting point of alumina
only.
(1)
T
1
!
T
2
(2)
T
1
T
2
Ans:
(1)
26. Identify ‘Q’ in the following sequence of reactions :
(3)
V
V
(4)
f
!
f
1
2
1
2
COCH
3
Ans:
(1)
PC
l
5
NaNH
2
30. Arrange the following compounds in the increasing
o
P
o
Q
excess
order of their acidic strength :
i.
m-nitrophenol
ii.
m-cresol
iii. phenol
iv. m-chlorophenol
(1)
(2)
(1) ii < iii < iv < i
(2) iii < ii <i < iv
O
(3)
(4)
(3) ii < iii < i < iv
(4) ii < iv < iii < i
Ans:
(1)
Ans:
(1)
27. What amount of dioxygen (in gram) contains
3
22
31. In the reaction
S O
o
SO
2x kj
and
1.8
u
10
molecules ?
2
3
2
(1) 9.60
1
(2) 0.0960
SO
O
o
SO
y kj
2
2
3
2
(3) 96.0
(4) 0.960
heat of formation of
SO
is
2
Ans:
(4)
(1)
2x - y
(2) x + y
28. The pair of compound which cannot exist together in
(3) 2x + y
(4) x - y
solution is
Ans:
(Bonus)
(1)
NaHCO
and
Na
CO
Note: Correct answer is (-2x) + y
3
2
3
32. Which of the following is not true?
(2)
NaHCO
and NaOH
3
(1) Prontosil is not converted into sulphanilamide in
(3)
Na
CO
and NaOH
2
3
the body.
(2) Erythromycin is a bacteriostatic antibiotic.
(4)
NaHCO
and
H
O
3
2
(3) Vancomycillin is a broad spectrum antibiotic.
Ans:
(2)
(4) Ampicillin is not a natural antibiotic.
Ans:
(1)
3 / 6
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CODE-D2
38. An alkali metal hydride (NaH) reacts with diborane
33. Using MOT, compare
O
and
O
species and choose
2
2
in “A” to give a tetrahedral compound ‘B’ which is
the incorrect option.
extensively used as reducing agent in organic
(1)
O
is diamagnetic while
O
is paramagnetic.
synthesis.The compounds ‘A’ ans ‘B’ respectively are
2
2
(1)
C
H
and NaBH
(2)
O
have higher bond order than
O
6
6
4
2
2
(2)
C
H
and C
H
Na
2
6
2
5
(3) Both
O
and
O
are paramagnetic.
2
2
(3)
C
H
O And NaBH
(4)
O
is less stable.
2
5
2
4
2
Ans:
(1)
(4)
CH
COCH
And B
N
H
3
3
3
3
6
34. Which of the following compound the “C - H” bond
Ans:
(3)
with the lowest bond dissociation energy?
39. Water softening by Clark’s process uses
(1) n-pentane
(1)
Na
CO
(2)
CaHCO
2
3
3
(2) Toluene
(3) 2, 2-dimethyl propane
(3)
Ca OH
(4)
NaHCO
2
3
(4) Benzene
Ans:
(3)
Ans:
(2)
40. One of the following conversion result in the change
35. The correct statement is
of hybridization and geometry :
(1) There is maximum
p
S
p
S
back bonding in
BF
3
(1)
BF
to BF
(2)
CH
to C
H
3
4
4
2
6
(2)
BF
is the strongest Lewis acid among the other
3
(3)
H
O to H
O
(4)
NH
NH
boron halides.
2
3
3 to
4
Ans:
(1)
(3) There is minimum
p
S
p
S
back bonding in
BF
3
41. In presence of HC
l,
H
S
result the precipitation of
(4)
BI
is the weakest Lewis acid among the boron
2
3
Group- 2 elements but not Gp-4 elements during
halides.
qualitative analysis, It is due to
Ans:
(1)
2
(1) lower concentration of
S
36. Acetic acid is treated with
Ca OH
and the product
2
2
(2) higher concentration of
S
so obtained is subjected to dry distillation.The Final
product is
(3) lower concentration of
H
(1) propanone
(2) ethanal
(4) higher concentration of
H
(3) ethanol
(4) propanal
Ans:
(1)
Ans:
(1)
42. The two electrons have the following set of quantum
37. In the sequence of following reactions :
numbers :
COOH
1
1 NaNO
/ HC
Br
2
P
3,2,
2,
1 Br
2
273 278 K
KMnO
4
P
o
Q
o
R
o
2
2 Sn / HC
l
2 H
2
O / H
3
PO
2
OH
1
the starting compound ‘P’ is
Q
3,0,0,
2
(1) o- bromo toluene
Which of the following statement is true ?
(2) o- nitro toluene
(1) P has lesser energy than Q
(3) p- nitro toluene
(2) P and Q have same energy
(4) m- nitro toluene
(3) P and Q represent same electron
Ans:
(3)
(4) P has greater energy than Q
Ans:
(4)
4 / 6
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CODE-D2
49. In the given set of reactions,
43. Orlon has monomeric unit
AgCN
LiAlH
4
(1) Vinyl cyanide
(2) Acrolein
2
Bromopropane
ou
o
Y
alc./ heat
(3) Isoprene
(4) Glycol
the IUPAC name of product ‘Y’ is
Ans:
(1)
(1) Butan-2-amine
44. Adenosine is an example of
(2) N-Methylpropanamine
(1) Pyrimidine base
(3) N-Methylpropan-2-amine
(2) Nucleotide
(4) N-Isopropylmethanamine
(3) Nucleoside
Ans:
(3)
(4) Purine base
50.
H
O
cannot oxidise
2
2
Ans:
(3)
(1)
O
(2) PbS
45. While charging the lead storage battery,___
3
(1)
PbSO
on cathode is oxidized to Pb
(3) KI
(4)
Na
SO
4
2
3
Ans:
(1)
(2)
PbSO
on anode is reduced to Pb
4
51. Which of the following will be able to show
(3)
PbSO
on anode is oxidized to
PbO
4
2
geometrical isomerism ?
(1) MABCD - Square planar
(4)
PbSO
on cathode is reduced to Pb
4
Ans:
(2)
(2) MA
3
B - Square planar
46. The unit cell with crystallographic dimensions,
(3) MABCD - Tetrahedral
a z b z c,
D
J
90 and
E z
90
is
(4) MA
2
B
2
- Tetrahedral
(1) Orthorhombic
Ans:
(1)
(2) Triclinic
52. Copper is extracted from Copper pyrites by heating
in a Bessemer converter. The method is based on the
(3) Tetragonal
principle that
(4) Monoclinic
(1) Copper has less affinity for oxygen than Sulphur
Ans:
(4)
at high temperature.
47. Sodium metal crystallizes in B.C.C lattice with edge
(2) Copper has more affinity for oxygen than Sulphur
lenght of 4.29
A
. The radius of sodium atom is
at high temperature.
(1) 2.145
A
(2) 2.857
A
(3) Sulphur has less affinity for oxygen at high
temperature.
(3) 1.857
A
(4) 1.601
A
(4) Iron has less affinity for oxygen than Sulphur
Ans:
(3)
at high temperature.
48. On heating with concentrated
NaOH
solution in an
Ans:
(1)
inert atmosphere of
CO
, white phosphorous gives a
2
53. The electrolyte having maximum flocculation value
gas. Which of the following statement is incorrect
for
Agl / Ag
sol. is
about the gas ?
(1)
Na
SO
(2)
NaC
l
(1) It is highly poisonous and has smell like rotten
2
4
fish.
(3)
Na
PO
(4)
Na
S
3
4
2
(2) It is less basic than
NH
3
Ans:
(2)
(3) It’s solution in water decomposes in the presence
54. In a first order reaction, the concentration of the
of light.
reactant is reduced to 12.5% in one hour. When was
(4) It is more basic than
NH
it half completed ?
3
(1) 30 min
(2) 3 hr
Ans:
(4)
(3) 15 min
(4) 20 min
Ans:
(4)
5 / 6
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CODE-D2
55.
0.06% (w/v) aqueous solution of urea is isotonic with
58. The hydrolysis of optically active 2-bromobutane with
aqueous
NaOH
result in the formation of
(1) 0.01 M glucose solution
(2) 0.06% glucose solution
(1)
(
r
)
butan-1-ol
(3) 0.1 M glucose solution
(2)
(
)
butan-2-ol
(4) 0.6% glucose solution
(3)
(
r
)
butan-2-ol
Ans:
(1)
(4)
(
)
butan-2-ol
56. In
H
O
fuel cell the reaction occurring at cathode
2
2
is
Ans:
(3)
NH
4
OH
NH
4
OH
H
2
S
MSO
o p
X
o
Y
o p
Z
1
59.
4
excess
white
(1)
H e
o
H
2
2
Here M and Z are
(2)
2H
2
(g )
O
2
(g )
o
2H
2
O
(l)
(1) Fe, FeS
(2) Cu, ZnS
(3)
A
l,
A
l
2
S
(4) Zn, ZnS
3
(3)
H
(aq )
OH
(aq )
o
H
2
O
(l)
Ans:
(4)
(4)
O
2H
O
4e
o
4OH
2
2(g )
2
(l)
(aq )
60. The electronic configuration of
Gd
is
Ans:
(4)
(at. no. of Gd is 64)
57. The distinguishing test between methanoic acid and
7
1
2
(1) [Xe]
4f
5d
6s
ethanoic acid is
(2) [Xe]
8
4f
(1) Esterification test
7
1
(2) Litmus test
(3) [Xe]
4f
5d
(3) Sodium bicarbonate test
7
(4) [Xe]
4f
(4) Tollen’s test
Ans:
(3)
Ans:
(4)
6 / 6
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