Acetophenone is prepared by the reaction of which of the following in the presence of $AlCl_3$ catalyst?

Chromyl chloride converts a methyl group to a chromium complex,which on acid hydrolysis gives the corresponding aldehyde. This reaction is called:

The major product formed in the following reaction scheme is

Reaction: $CH_3OH + O_2 \xrightarrow{600\,^oC, \text{Ag}} \text{Product}$. The product is:

Identify the name of the following reaction:
$Toluene + CrO_2Cl_2$ $\xrightarrow{CS_2} \text{complex}$ $\xrightarrow{H_3O^+} \text{Benzaldehyde}$

Benzonitrile $(C_6H_5CN)$ reacts with a Grignard reagent in dry ether followed by hydrolysis to form benzophenone $(C_6H_5COC_6H_5)$ along with ammonia $(NH_3)$ and hydroxymagnesium bromide $(Mg(OH)Br)$. Identify the reagent used in the above transformation.