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Chemistry · PYQ NEET UG 2024

हिन्दी

Identify the major product C formed in the following reaction sequence: \( \text{CH}_3-\text{CH}_2-\text{CH}_2-\text{I} \xrightarrow{\text{NaCN}} \text{A} \xrightarrow[\text{Partial hydrolysis}]{\text{OH}^-} \text{B} \xrightarrow{\text{NaOH} / \text{Br}_2} \text{C (major)} \)

  1. butanamide
  2. \( \alpha \)-bromobutanoic acid
  3. propylamine
  4. butylamine

Correct answer · Option 3

propylamine

Explanation

Product A is butanenitrile (\( \text{CH}_3\text{CH}_2\text{CH}_2\text{CN} \)), which on partial hydrolysis yields butanamide (Product B, \( \text{CH}_3\text{CH}_2\text{CH}_2\text{CONH}_2 \)). Hofmann bromamide degradation of butanamide yields propylamine (Product C, \( \text{CH}_3\text{CH}_2\text{CH}_2\text{NH}_2 \)).
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