1.

(b) There are two -NH2 groups in semicarbazide. However, only one is involved in the formation ofsemicarbazones

AnswerΒ»

There are two 2NHgroup in semicarbazide. However,onlyone isinvolvedin theformationofsemicarbazone. This is because one N atom isinvolvedin resonance with carbonyl carbon atom and thus its lone pair is not available for bonding

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