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Question

Chemistry Question on Aldehydes, Ketones and Carboxylic Acids

For an SN2 reaction, arrange the following alkyl halides in increasing order of reactivity:
(A) CH3CH2CH2CH2
(B) CH3CH2CH(Br)CH3
(C) (CH3)3
(D) (CH3)2CHCH2

A

(A) < (B) < (C) < (D)

B

(A) < (C) < (B) < (D)

C

(B) < (A) < (D) < (C)

D

(C) < (B) < (D) < (A)

Answer

(B) < (A) < (D) < (C)

Explanation

Solution

For SN2 reactions, primary alkyl halides react faster than secondary and tertiary halides. Therefore, the increasing order of reactivity is

(B) < (A) < (D) < (C)