Uses Of Aldehydes And Ketones

When toluene is treated with chromic oxide (CrO ) in acetic anhydride at a temperature range of 273K to 283K, the methyl group (–CH ) on the benzene ring undergoes oxidation. The reaction leads to the formation of benzylidene diacetate, which results from the formation of a C=O group and the addition of the acetic anhydride. In contrast, benzaldehyde, benzoic acid, and other options are not the products of this specific reaction under the given conditions.

The correct option is (B) : benzylidene diacetate

Valeraldehyde is a five-carbon aldehyde with the chemical formula C₅H₁₀O, and it is represented as CH₃CH₂CH₂CH₂CHO. This structure corresponds to option (A), where the aldehyde group (CHO) is attached to a four-carbon chain (butyl group). The other options represent different aldehydes or compounds, but not valeraldehyde.

The correct option is (A) : CH₃CH₂CH₂CH₂CHO