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2020 H2 Chem P1 Q25 — Nitrogen Compound Solution

Nitrogen Compound 2020 A-Level H2 Chemistry · Paper 1 · Q25

Question

The compound \(\text{C}_3\text{H}_7\text{CONH}_2\) is an amide.

Which statement about this amide is correct?

AIts name is propanamide.
BWhen heated with NaOH(aq), it will form sodium propanoate.
CWhen heated with \(\text{H}_2\text{SO}_4\text{(aq)}\), it will form butanoic acid.
DIt can be formed using butanoic acid and \(\text{NH}_3\text{(aq)}\) at room temperature.

Correct answer: C

Video Solution

Explanation

A Incorrect. \(\text{C}_3\text{H}_7\text{CONH}_2\) is butanamide.

B Incorrect. \(\text{C}_3\text{H}_7\text{CONH}_2\) will undergo alkaline hydrolysis to form \(\text{CH}_3\text{CH}_2\text{CH}_2\text{COO}^-\text{Na}^+\) (sodium butanoate) and \(\text{NH}_3\) (ammonia).

C Correct. \(\text{C}_3\text{H}_7\text{CONH}_2\) will undergo acidic hydrolysis to form \(\text{CH}_3\text{CH}_2\text{CH}_2\text{COOH}\) (butanoic acid).

D Incorrect. Carboxylic acid and ammonia will undergo acid-base reaction instead of condensation. Butanoyl chloride should be used instead.

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