The reagent used to distinguish between acetaldehyde and benzaldehyde is

Options

A. Tollen's reagent
B. Fehling's solution
C. 2,4-dinitrogphenlydrazine
D. semicarbazide

Answer

B

Explanation

`underset(underset("aldehyde")("Aliphatic"))(R-CHO) + ubrace(2Cu^(2) + 5OH^(-))_("Fehling's solution") overset(Delta)rarr RCOO^(-) + underset(underset(("Red ppt"))("Cuprous oxide"))(Cu_(2)O darr + 3H_(2)O)`
Benzaldehyde does not respond to Fehling's solution due to alkaline nature of this reagent.