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Reaction of carbonyl compound with one o...

Reaction of carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is:

A

A grignard reagent

B

Hydrazine in presence of feebly acidic solution

C

Hydrocyanic acid

D

Sodium hydrogen sulphite

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The correct Answer is:
B
With Ammonia derivation carbonyl compounds give addition followed by elimination reaction. Slightly acidic medium will generate a nucleophilic centre for weak base like ammonia derivatives.
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Reaction of carbonyl compound with one of the following regents involves nuclephilic addition following by elimination of water. The reagent is:

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