In Rosenmund reactions, presence of $B a S O_{4}$ acts as _______ for Pd.

promoter

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moderator

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inhibitor

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poison

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Solution

The correct option is D poison
The Rosenmund reaction is catalyzed by pollution or barium sulphate. $B a S O_{4}$ reduce activity of polludium. Because $P d$ being a strong reducing agent it will further reduce Aldehyde to Alcohol. Hence, $B a S O_{4}$ acts as poison for $P d$

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Similar questions

B a S O_{4}

P d - B a S O_{4}

CH3COCl+H2------->CH3CH2OH------->CH3CHO(in presence of pd,BaSO4 and quinoline).

Here quinoline acts as what?

a)+ve catalyst

b)catalyst poison

c)promoter

d)medium

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