Consider the reactions,

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-Semicarbazide
C. A-Ethanal, X-Ethanol, Y-But-2-enal, Z-Semicarbazone
D. A-Ethanol, X-Acetaldehyde, Y-Butanone, Z-Hydrazone

Answer

C

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 (by assuming alkali to be dilute) indicates that A is aldehyde as aldol reaction of ketones is reversible and carried out in special apparatus .
This indicates option (3).