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Question

The reactivity of alkyl bromides.
(A) CH3CH2Br
(B) CH3−C|CH3H−Br
(C) CH3−CH3|C|CH3−Br
(D) CH3Br.

A
D> A> B > C
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B
A> D > B > C
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C
C> B > A > D
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D
C > B > D > A
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Solution

The correct option is B D> A> B > C
The reactivity of alkyl bromides
(A) CH3CH2Br
(B) CH3C|CH3HBr
(C) CH3CH3|C|CH3Br
(D) CH3Br
towards nucleophilic substituiton reaction follows the order D> A> B > C or CH3Br>CH3CH2Br>CH3C|BrHCH3>CH3CH3|C|CH3Br.
More hindered (more substituted) C atom cannot be easily approached by a nucleophile. Hence such alkyl halide will have lower reactivity.

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