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Chemistry Question on Aldehydes, Ketones and Carboxylic Acids

A research scholar returned to the laboratory after the lock down due to Covid-19. He kept acetone, benzaldehyde, acetaldehyde and diethyl ketone in four different bottles. The bottles contained only the label as P, Q, R and S. He forgot which bottle contained which compound. Compounds P and R only underwent iodoform test. Compound R alone gave reddish brown precipitate with Fehling's reagent. Compounds Q and R alone underwent Tollen's test. Compound S did not answer any of the above tests. Identify the compounds P, Q, R and S.

A

P-diethyl ketone; Q-benzaldehyde; R-acetaldehyde; S-acetone

B

P-acetone; Q-benzaldehyde; R-acetaldehyde; S-diethyl ketone

C

P-acetone; Q-acetaldehyde; R-benzaldehyde; S-diethyl ketone

D

P-acetaldehyde; Q-acetone; R-diethyl ketone; S-benzaldehyde

E

P-benzaldehyde; Q-diethyl ketone; R-acetone; S-acetaldehyd

Answer

P-benzaldehyde; Q-diethyl ketone; R-acetone; S-acetaldehyd

Explanation

Solution

The correct option is (E) : P-benzaldehyde; Q-diethyl ketone; R-acetone; S-acetaldehyd