Q.1.
Why is light necessary to bring in chlorination reactions of alkane?
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33%
a) The dissociation of Cl2 gives free radical
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33%
b) The Cl2 molecues absorbs light to show homolytic bond fission
-
0%
c) The formation of free radical propogate the chain reaction
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33%
d) All of the above
Q.2.
Who pointed out the concept of hyperconjugation?
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67%
a) Nathan and Baker
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0%
b) Mullikan
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33%
c) Kekule
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0%
d) Kolbe
Q.3.
Which of the following is free radical?
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0%
a) Cl-
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33%
b) Cl+
-
33%
c) NO2
-
33%
d)
Q.4.
The stability order for carbocations given below is :
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67%
a) I < II < III
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33%
b) III < II < I
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0%
c) III < I < II
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0%
d) II < I < III
Q.5.
The reaction, is called
-
75%
a) elimination reaction
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0%
b) substitution reaction
-
25%
c) rearrangement reaction
-
0%
d) none of the above
Q.6.
Which of the follwoing cannot show electromeric effect?
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0%
a) Alkenes
-
50%
b) ketones
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0%
c) aldehydes
-
50%
d) Ethers
Q.7.
A secondary (2°) carbon atom is one that is joined to
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33%
a) 1-alkyl group
-
67%
b) 2-alkyl groups
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0%
c) 3-alkyl group
-
0%
d) none of these
Q.8.
Which of the following is singlet carbene?
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67%
a) (CH3)3C+
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0%
b) CH2 = CH - C+H2
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33%
c)
-
0%
d)
Q.9.
The resonating structures
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33%
a) differ only in the arrangement of electrons
-
33%
b) differ in number of paired and unpaired electrons
-
33%
c) differ largely in their energy contents
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0%
d) do not lie in the same plane
Q.10.
Which of the following does not show resonance
-
0%
a) Carbon dioxide
-
0%
b) Benzene
-
0%
c) Nitromethane
-
100%
d) Propane
Q.11.
The increasing order of +ve I-effect shown by H, CH3, C2H5 and C3H7 is
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33%
a) H < CH3 < C2H5 < C3H7
-
33%
b) H > CH3 < C2H5 > C3H7
-
33%
c) H < C2H5 < CH3 < C3H7
-
0%
d) none of the above
Q.12.
Which of the following can act as an nucleophile?
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0%
a) BF3
-
0%
b) FeCl3
-
33%
c) ZnCl2
-
67%
d) C2H5MgBr
Q.13.
Which one of the following is miost reactive towards electrophilic attack?
-
33%
a)
-
67%
b)
-
0%
c)
-
0%
d)
Q.14.
The stability of carbanion in the following
-
33%
a) (2) > (3) > (4) > 91)
-
67%
b) (4) > (2) > (3) > (1)
-
0%
c) (1) > (3) > (2) > (4)
-
0%
d) (1) > (2) > (3) > (4)