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Hydrogenation of benzoyl chloride in the...

Hydrogenation of benzoyl chloride in the presence of Pd on `BaSO_4` gives

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(B) The reaction is known as Rosenmund's reaction
`C_(6)H_(5)COCl+H_(2)overset(Pd)underset(BaSO_(4))toC_(6)H_(5)CHO+HCl`
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