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Solution


Q.

Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is     [2015]
1 hydrazine in presence of feebly acidic solution  
2 hydrocyanic acid  
3 sodium hydrogen sulphite  
4 a Grignard reagent  

Ans.

(1)

Carbonyl compounds react with ammonia derivatives in weakly acidic medium as follows:

Here, Z is hydrazine.