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Q.

Which of the following reactions does not give benzaldehyde?

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a

 Friedel-Craft acylation reaction

b

 Gatterman-Koch reaction

c

Rosenmund reaction

d

Etard reaction

answer is A.

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Detailed Solution

Friedel-Crafts acylation of benzene produces an aromatic ketone and not benzaldehyde. Benzene on Gatterman-Koch reaction gives benzaldehyde, so does toluene on Etard reaction. Rosenmund reaction also gives benzaldehyde but from benzoyl chloride.

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