Question

Match the List I (reaction) with List II (reaction intermediate) and select the correct answer using the codes given below the Lists.

List I

List II

Answer 1

(A) When polyhalogenated alkanes are heated with alc. $KOH$, a polyhalogenated alkene is obtained. This is a dehydrohalogenation reaction.
A carbanion is formed as the reaction intermediate.
(B) $Tert-$ butyl alcohol on dehydration forms $2$-methyl-$2$-butene.
A carbocation is formed as the reaction intermediate.
(C) Dehydrobromination of ethyl bromide (on heating with alcoholic $KOH$) forms ethylene.
A transition state is present but no intermediate is formed.
(D) Dehydrobromination of tert butyl bromide (on heating with alcoholic $KOH$) forms $2$-methyl-$2$-butene.
A carbocation is formed as the reaction intermediate.