Karnataka Examination Authority has conducted Common Entrance Test on May 12 and 13th. Our experts has solved the question papers and given the Key Answers.
Please find KCET 2015 Chemistry Key Answers.
45. Ans:(2)
46. Ans:(4)
47. Ans:(3)
48. Ans:(4)
49. Ans:(3)
50. Ans(1)
51. Ans(1)
52. Ans(1)
53. Ans(2)
54. Ans(4)
55. Ans(1)
56. Ans(4)
57. Ans(4)
58. Ans(3)
59. Ans(4)
60. Ans(3)
Please find KCET 2015 Chemistry Key Answers.
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CHEMISTRY
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[Code :D2]
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1.
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Number of possible alkynes with
formula C 5 H8 is
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6.
On heating potassium permanganate, one of the
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(1)
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4
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(2)
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2
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following compound is not obtained :
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(1)
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MnO2
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(2)
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O2
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(3)
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5
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(4)
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3
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Ans:
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(4)
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(3)
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K 2
MnO4
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(4)
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MnO
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2.
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Glycogen is
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Ans:
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(4)
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(1)
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structurally very much similar to amylopectin
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7.
The salt which responds to dilute and concentrated
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(2)
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a polymer of
-D-glucose units
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H 2
SO4 is
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(3)
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structurally similar to amylopectin
but extensively
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(1)
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Na 2SO4
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(2)
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CaF2
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branched
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(4)
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a structural polysaccharide
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(3)
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Na 3 PO4
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(4)
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Ba(NO 3 )2
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Ans:
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(3)
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Ans:
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(4)
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3. How many ions per molecule are produced
in the
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8.
Half life period of a first order reaction is 10 min.
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solution when Mohr salt is dissolved
in excess of
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Starting with initial concentration
12 M. the rate after
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water?
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20 min is
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(1)
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6
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(2) 4
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(1)
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0.0693 3 M min-1
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(2)
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0.0693 M min-1
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(3)
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10
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(4) 5
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(3)
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0.0693 4 M min-1
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(4)
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0.693 3 M min-1
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Ans:
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(4)
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Ans:
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(1)
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4. Which of the following curve is in
accordance with
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Freundlich adsorption isotherm?
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x
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m
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x
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m
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(1)
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log
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(2)
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log
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log p
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p
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x
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m
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x
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m
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(3)
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log
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(4)
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log
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log p
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p
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Ans:
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(1)
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dryether
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H
2 O
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5.
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Br
MgA
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B.
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H
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The
product ‘B’ is
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(1)
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OH
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(2)
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OH
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(3)
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(4)
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MgBr
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Ans:
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(1)
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9.
Which of the following aqueous solution has the
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highest freezing point ?
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(1)
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0.1 M NaCl
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(2)
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0.1 M Sucrose
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(3) 0.01 M Na 2 SO4 (4) 0.01 M NaCl
Ans: (4)
10.
0.30 g of an organic compound containing C, H
and Oxygen on combustion yields 0.44 g CO2 and 0.18 g
H 2O . If one mol of compound weighs 60,
then molecular formula of the compound is
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(1)
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C 4
H 6 O
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(2)
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CH 2O
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(3)
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C 2
H 4 O2
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(4)
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C 3
H 8O
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Ans:
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(3)
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11.
For one of the element various successive
ionization enthalpies (in kJ mol 1 )
are given below :
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1810
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14,820
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The element is
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(1)
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Al
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(2)
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Si
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(3)
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Mg
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(4)
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P
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Ans:
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(1)
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12. The aqueous solution of following salt
will have the lowest pH :
13. One of the following is an essential amino
acid.
14. The formation of cyanohydrin from a
ketone is an example of
(1) Electrophilic addition
(2) Nucleophilic substitution
(3) Electrophilic substitution
(4) Nucleophilic addition
Ans: (4)
15. 100 cm3 of 1 M CH3COOH was mixed with 100 cm3 of 2 M CH3OH to form an ester. The change in the
initial rate if each solution is diluted with equal volume of water would be
16.
How many Coulombs of electricity are required
for the oxidation of one mol of water to dioxygen?
17. Cheilosis and digestive disorders are
due to the deficiency of
18. One of the following amide will not
undergo Hoffmann bromamide reaction :
20. The arrangement of following compounds
:
i. bromomethane
ii. bromoform
iii. chloromethane
iv. dibromomethane
In the increasing order of their boiling point is
(1) ii < iii < i < iv
(2) iii < i < iv < ii
(3) i < ii < iii < iv
(4) iv < iii < i < ii
Ans: (2)
21. The complex ion having minimum
magnitude of 0
(CFSE) is
3
(1) Co Cl 6
3
(2) Cr CN 6
3
(3) Cr H 2O
6
3
(4) Co NH3 6
Ans: (1)
22. Which of the following colloids cannot
be easily coagulated ?
(1) Macromolecular colloids
(2) Lyophobic colloids
(3) Irreversible colloids
(4) Multimolecular colloids
Ans: (1)
23. After adding non-volatile solute freezing
point of
24. Which of the following compound of
Xenon has pyramidal geometry ?
(1) XeO3
(3) XeF4
Ans: (1)
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| 25. | Ans:(1) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 26. | Ans:(1) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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27.What
amount of dioxygen (in gram)
contains
1.81022
molecules ?
(1) 9.60
(2) 0.0960
(3) 96.0
(4) 0.960
Ans: (4)
28. The pair of compound which cannot
exist together in solution is
(1) NaHCO3
and Na 2 CO3
(2) NaHCO3
and NaOH
(3) Na 2 CO3 and NaOH
(4) NaHCO3 and H 2O
Ans: (2)
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| 29. Ans:(1) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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30. Arrange the following compounds in the
increasing order of their acidic strength :
(1) ii < iii < iv < i
(2) iii < ii <i < iv
(3) ii < iii < i < iv
(4) ii < iv < iii < i
Ans: (1)
Ans: (Bonus)
Correct
answer is (–2x) + y
32. Which of the following is not true?
(1) Prontosil is not converted into
sulphanilamide in the body.
(2) Erythromycin is a bacteriostatic
antibiotic.
(3) Vancomycillin is a
broad spectrum antibiotic.
(4) Ampicillin is not a natural
antibiotic.
Ans: (1)
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33. Using MOT, compare O2 and O2 species and choose the incorrect
option.
(1)
O2 is diamagnetic while O2 is paramagnetic.
(2) O2 have higher bond order than O2 .
(3) Both O2 and O2
are paramagnetic.
(4) O2 is less stable.
Ans: (1)
34.
Which of the following compound the “C - H”
bond with the lowest bond dissociation energy?
(1) n-pentane
(2) Toluene
(3) 2, 2-dimethyl propane
(4) Benzene
Ans: (2)
35. The correct statement is
(1) There is maximum p p
back bonding in BF3
(2) BF3 is the strongest Lewis acid among the
other boron halides.
(3) There is minimum p p back
bonding in BF3
(4) BI3 is the weakest Lewis acid among the
boron halides.
Ans: (1)
36. Acetic acid is treated with Ca OH 2 and
the product so obtained is subjected to dry distillation.The Final
Ans: (1)
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37. Ans: (3)
38.Ans: (3)
39.Ans:(3)
40. Ans:(1)
41.
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| 42. Ans: (4) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 43. Ans:(1) | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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46. Ans:(4)
47. Ans:(3)
48. Ans:(4)
49. Ans:(3)
50. Ans(1)
51. Ans(1)
52. Ans(1)
53. Ans(2)
54. Ans(4)
55. Ans(1)
56. Ans(4)
57. Ans(4)
58. Ans(3)
59. Ans(4)
60. Ans(3)
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