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An organic compound A upon reacting with NH3 gives B. On heating B gives C. C in presence of KOH reacts with Br2 to give CH3CH2NH2. A is:

1. CH3COOH
2. CH3CH2CH2COOH
3. CH3—CH—COOH | CH3
4. CH3CH2COOH

Correct answer: CH3CH2COOH

Solution

The correct option is CH3CH2COOH because it is a carboxylic acid that can react with ammonia to form an amide, which upon heating can lead to an amine. The final product, CH3CH2NH2, indicates that the original compound must have a two-carbon chain to yield the correct amine after the reactions.

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