1.

A carbonyl compound 'A'' react with hydrogen cyanide to give cyanohydrin 'B' which on acid hydrolysis gives optically active alpha - hydroxy propanoic acid 'C' Compounds A, B, C respectively are ,

Answer»

`HCHO, H - UNDERSET(CN) underset(|) overset(H)overset(|) (C) - OH,H - underset(COOH) underset(|) overset(H) overset(|) (C) - OH `
`CH_(3) - CHO,CH_(3) - underset(CN) underset(|) overset(H) overset(|) (C) - OH,CH_(3) - underset(COOH) underset(|) overset(H) overset(|) (C) - OH`
`C_(2)H_(5) - CHO,C_(2)H_(5) - underset(CN) underset(|) overset(H) overset(|) (C) - OH,C_(2) H_(5) - underset(COOH) underset(|) overset(H) overset(|) (C) - OH`
`CH_(3) - overset(CH_(3))overset(|) (C) = O ,CH_(3) - underset(CN) underset(|) overset(CH_(3))overset(|) (C) - OH ,CH_(3) - underset(COOH) underset(|) overset(CH_(3)) overset(|) (C) - OH`

Answer :B


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