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Question:

In the following reaction H3CCHO + NH2NH2 → A → B → CH3CH3 + N2, identify A and B.

CH3CH2−NH2 and C2H5ONa

CH3CH=NNH2 and C2H5ONa

CH3CH2NH2 and C2H5OH

CH3−NH−NH−CH3 and C2H5OH

Solution:

The correct option is A: CH3CH=NNH2 and C2H5ONa
CH3CHO + H2N−NH2 → CH3CH=N−NH2
C2H5ONa → CH3−CH3 + N2
Hence option A is correct.