Question

The alkyl halide is converted into an alcohol by:

• A. elimination
• B. dehydrohalogenation
• C. addition
• D. substitution

Answer 1

Answer: (D)

substitution

Alkyl halides on alkaline hydrolysis get converted into alcohols. This takes place by a nucleophilic substitution reaction where the $-X$ atom is substituted by a nucleophile i.e $-OH$ group.
The primary alkyl halides undergo nucleophilic substitution reaction by $S_{N}2$ mechanism, while tertiary alkyl halides follow $S_{N}1$ mechanism.

$R-X+KOH\to R-OH+KX$

The above is the example of a substitution reaction.