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Compound 'P' undergoes the following sequence of reactions : P (i) NH3 (ii) Δ → Q (i) KOH, Br2 (ii) CHCl3, KOH (alc), Δ → cyclohexane ring product bearing NC substituent P is :

1. cyclohexane ring attached to –CH2–CH2–CHO
2. cyclohexane ring attached to –COOH
3. cyclohexane ring attached to –CO–CH2CH3
4. cyclohexane ring attached to –CONH2

Correct answer: cyclohexane ring attached to –COOH

Solution

The correct option is a cyclohexane ring attached to –COOH because the sequence of reactions indicates the formation of a carboxylic acid, which is consistent with the reagents used, particularly the KOH and Br2 that suggest a halogenation followed by hydrolysis, leading to the carboxylic acid functional group.

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