Q. 15 C5.0( 1 Vote )

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Answer :

When aqueous KOH is reacted with an alkyl chloride, KOH ionizes completely to give OH- ions and the hydroxyl ions being the strong nucleophile and a strong base react with alkyl chloride to give alcohol. The hydroxyl ion does not have the capability to extract a hydrogen atom from the alkyl chloride. The reaction is as follows:


In case of alcoholic KOH, the KOH molecule itself contains an alkoxide ion which itself is a very strong base as compared to hydroxyl ion and this alkoxide ion has the capability to extract a hydrogen atom from the alkyl chloride and thus alkene is obtained as the major product. The reaction is as follows:



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