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Match the following reactions: (a) R-COCl R-CHO, H2/Pd-BaSO4, Rosenmund Reduction (b) R-CH2-COOH R-CH(Cl)-COOH, Cl2/P, H2O, HVZ reaction (c) R-CONH2 R-NH2, Br2/NaOH, Hoffmann Bromamide reaction (d) R-CO-CH3 R-CH2-CH3, Zn(Hg), conc. HCl, Clemmenson reduction

1. (a) (ii)
2. (b) (iv)
3. (c) (i)
4. (d) (iii)

Correct answer: (a) (ii)

Solution

The Rosenmund Reduction specifically converts acyl chlorides (R-COCl) to aldehydes (R-CHO) using hydrogen in the presence of palladium on barium sulfate, making option (a) correctly matched with (ii).

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