Consider the reaction

Identify `A, X, Y and Z`

Options

A. A-Methoxymethane, X-Ethanoic acid, Y-Acetate ion, Z-hydrazine.
B. A-Methoxymethane, X-Ethanol, Y-Ethanoic acid, Z-Semicarbazone
C. A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone.
D. A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone.

Answer

B

Explanation

Since 'A' gives positive silver mirror test therefore, it must be an aldehyde or `alpha`-hydroxyketone. Reaction with semicarbazide indicates that A can be an aldehyde or ketone. Reaction with `OH-` i.e., aldol condensation indicates that A is aldehydes as aldol reaction of ketones is reversible and carried out in a special apparatus. These indicates that option (b) is correct.