Which of the following reaction(s) can be used for the preparation of alkyl halides?
(I) `CH_(3)CH_(2)OH+HCl overset("anhyd." ZnCl_(2))to`
(II) `CH_(3)CH_(2) OH+HCl to`
(III) `(CH_(3))_(3)COH+HCl to`
(IV) `(CH_(3))_(2)CHOH+HCl overset("anhyd." ZnCl_(2))to`

Options

A. (I) and (II) only
B. (IV) only
C. (III) and (IV) only
D. (I),(III) and (IV) only

Answer

D

Explanation

`1^(@) and 2^(@)` alcohols react with HCl only in presence of anhyd. `ZnCl_(2)` as catalyst while in case of `3^(@)` alcohols, `ZnCl_(2)` is not required. Thus, reaction (II) cannot be used to prepares alkyl halides. While all other reactions can be used. in other words, option (d) is correct.