JEE Main Chemistry question

Hydrogenation of C₆H₅CHOH–COOH over Rh–Al₂O₃ catalyst in methanol gives

(A)C₆H₅CH₂COOH
(B)C₆H₁₁CH₂COOH
(C)C₆H₅CHOH·CH₂OH
(D)C₆H₁₁CHOH–COOHCorrect

Answer: (D)

Solution

Rh–Al₂O₃ is a catalyst highly effective at hydrogenating aromatic rings (not just alkenes/carbonyls) under appropriate pressure; the phenyl ring of mandelic-acid-type substrate C₆H₅CH(OH)COOH is fully saturated to a cyclohexyl ring,

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Question ID VK-149535