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The reaction, $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{I}+\mathrm{KOH}(a q) \longrightarrow$ $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{KI}$ is classified as
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The correct answer is:
nucleophilic substitution
Alkyl halides are hydrolysed to corresponding alcohols by boiling with aqueous alkali solution ( $\mathrm{NaOH}$ or $\mathrm{KOH}$ ).
$$
\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{I}+\mathrm{KOH} \longrightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{KI}
$$
This is nucleophilic substitution reaction in which the attacking nucleophile is $\mathrm{OH}^{-}$.
$$
\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{I}+\mathrm{KOH} \longrightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH}+\mathrm{KI}
$$
This is nucleophilic substitution reaction in which the attacking nucleophile is $\mathrm{OH}^{-}$.
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