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Question

The reduction of benzoyl chloride with Pd and BaSO4/CaSO3 produces :

A
benzyl chloride
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B
benzoic acid
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C
benzaldehyde
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D
All of the above
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Solution

The correct option is B benzaldehyde
The reduction of benzoyl chloride with Pd and BaSO4/CaSO3 produces benzaldehyde.
BaSO4 is poisoned with sulphur so that further reduction of benzaldehyde is prevented. This reaction is known as Rosenmund reaction.
C6H5COCl+H2Pd/BaSO4/CaSO3−−−−−−−−−−−C6H5CHO+HCl

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