2 Chemistry -- Haloalkanes

Why haloalkanes reacts with aq. KOH to give alcohol but with alc. KOH gives alkene? With reactions 

Why haloalkanes reacts with aq. KOH to give alcohol but with alc. KOH gives alkene? With reactions 

In an aqueous solution, KOH ionises completely to give OH - ions. OH - ion is a strong nucleophile, causing alkyl chloride to undergo a substitution reaction to form alcohol.



Whereas Alcoholic KOH is a strong base so it can abstract a hydrogen from the β-carbon of the alkyl chloride and form an alkene by eliminating a molecule of HCl. 


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