Q.
$C_6H_5CH_3 \xrightarrow{CrO_2Cl_2} Z$
In the given sequence $Z$ is
ManipalManipal 2005Aldehydes Ketones and Carboxylic Acids
Solution:
Toluene is oxidised to benzaldehyde in presence of chromyi chloride. This reaction is called Etards reaction.
