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Dehydration of Alcohols

Among the fol...

Question

Among the following the compounds which can undergo an $S_{N} 1$ reaction in an aqueous solution, are:

A

I a n d I V o n l y

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B

I I a n d I V o n l y

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C

I I a n d I I I o n l y

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D

I I, I I I a n d I V o n l y

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Solution

The correct option is A $I I a n d I I I o n l y$
$S_{N} 1$ reaction is governed by the stability of carbocation formed.

II carbocation is stabilised through +I effect of three $- C H_{3}$ group. III carbocation is resonance stabilised.

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