Etard reaction in the following is :

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(A) The $Etard$ reaction is a chemical reaction in which an aromatic or heterocyclic bound methyl group is directly oxidized to an aldehyde using chro

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Oxidation of toluene to benzaldehyde by chromyl chloride

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(A) The $Etard$ reaction is a chemical reaction in which an aromatic or heterocyclic bound methyl group is directly oxidized to an aldehyde using chromyl chloride $(CrO_2Cl_2)$.In this reaction,toluene is treated with chromyl chloride in a suitable solvent like $CS_2$ or $CCl_4$ to form a chromium complex,which upon hydrolysis yields benzaldehyde.The reaction is represented as: $C_6H_5CH_3 + 2CrO_2Cl_2$ $\rightarrow C_6H_5CH_3 \cdot 2CrO_2Cl_2$ $\xrightarrow{H_3O^+} C_6H_5CHO$.

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