Q.$CH_2=CH_2 \xrightarrow[\text{(ii) } Zn/H_2O]{\text{(i) } O_3} X \xrightarrow{NH_3} Y$ 'Y' is :

A family of nitrogen nucleophiles, H2N-G, all react by the same addition-elimination sequence: nucleophilic addition of nitrogen to the carbonyl carbon, protonation of the carbonyl oxygen, then loss of water to form a new C=N-G double bond (not a simple addition product). Which G is used sets both the product's name and its classic role as a solid, sharp-melting derivative for identifying an otherwise-liquid carbonyl compound: hydroxylamine (G=OH) gives an oxime; hydrazine (G=NH2) gives a hydrazone; phenylhydrazine gives a phenylhydrazone; semicarbazide gives a semicarbazone; 2,4-dinitrophenylhydrazine gives the classic bright orange/red 2,4-DNP hydrazone. Plain ammonia reacts differently again with four sp …