Question

Compound P is neutral. Q gives effervescence with NaHCO₃ while R reacts with Hinsbergs reagent to give solid soluble in NaOH. Compound P is

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is D

To determine the identity of Compound P, let us analyze the given information:

• Compound P is neutral.
• Compound Q gives effervescence with NaHCO₃. This indicates the presence of an acidic group, most likely a carboxylic acid as they react with sodium bicarbonate to produce effervescence due to CO₂ gas formation.
• Compound R reacts with Hinsberg's reagent, giving a solid soluble in NaOH. This indicates the presence of a primary amine in Compound R, as primary amines form a soluble sulfonamide.

Considering the possible structures based on these chemical reactions, Compound P must be an amide because:

1. Amides are generally neutral compounds as they do not show acidity or basicity under normal conditions.
2. Upon acidic hydrolysis, an amide breaks down into a carboxylic acid (Compound Q) and an amine (Compound R).

Therefore, Compound P has the generic structure of an amide. The correct answer option, representing Compound P, is illustrated below:

Thus, the neutral Compound P is an amide, which upon hydrolysis, yields a carboxylic acid and a primary amine, consistent with Compounds Q and R respectively.