Question

The number of correct reaction(s) among the following is ________.

Answer 1

Analyze Each Reaction:

Reaction (A): The reaction conditions suggest Friedel-Crafts acylation using anhydrous $\text{AlCl}_3$ and a carboxylic acid chloride. This reaction should proceed correctly, forming the expected acylated aromatic product.

Reaction (B): In this reaction, $\text{Pd/BaSO}_4$ (Rosenmund reduction conditions) is used to reduce an acyl chloride to an aldehyde. This reaction is incorrect.

Reaction (C): This reaction involves a carboxylic acid reacting with CO and HCl under anhydrous conditions with $\text{AlCl}_3$ or CuCl. However, this is not a standard reaction for carboxylic acid conversion to an acyl chloride under these conditions, so this reaction is incorrect.

Reaction (D): The conditions involve the reaction of a benzene derivative with $\text{CONH}_2$ and HCl. However, these reagents are not compatible with producing an expected product under the given conditions, making this reaction incorrect.

Conclusion:

Only Reaction (A) is correct among the given reactions. Therefore, the number of correct reactions is 1, corresponding to Option (1).