Oxidation of toluene to benzaldehyde by the use of chromyl chloride is called?A) Wurtz reactionB) Etard’s reactionC) Fittig reactionD) Rosenmund’s reaction

The oxidation of toluene to benzaldehyde using chromyl chloride is known as Etard’s reaction.

Explanation:
Reaction Overview:

In this reaction, toluene (C₆H₅CH₃) reacts with chromyl chloride (CrO₂Cl₂) to form benzaldehyde (C₆H₅CHO).
The process involves the formation of a chromyl complex that ultimately oxidizes the methyl group of toluene to an aldehyde.
Why Etard's Reaction?:

This reaction is specifically characterized by the oxidation of alkyl aromatic compounds to the corresponding aromatic aldehydes using chromyl chloride.
It was first described by the French chemist Pierre Etard, which is why it's named after him.
Other Options:

Wurtz Reaction: This is a coupling reaction that involves the reaction of alkyl halides with sodium to form higher alkanes.
Fittig Reaction: This involves the reaction of aryl halides with sodium in the presence of dry ether to form biaryls.
Rosenmund Reaction: This is the catalytic reduction of acyl chlorides to aldehydes using hydrogen gas in the presence of a palladium catalyst.
Conclusion:
Thus, the correct answer is B) Etard’s reaction.