Oxidation of toluene with ${\mathrm{CrO}}_3$to benzaldehyde is carried out in the presence of acetic anhydride. Explain why.

Write structures of compound A and B in the following reaction.

The major product of the following reaction is,

The major product of the following reaction is:

Write chemical equations for the following reaction :

Benzoyl chloride is hydrogenated in presence of $\mathrm{Pd}/{\mathrm{BaSO}}_4$.

In the reaction ${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{COCl}\underset{{\mathrm{H}}_2}{\overset{\mathrm{Pd}/{\mathrm{BaSO}}_4}{\to }}\mathrm{X}$,  the $\mathrm{X}$ is

Complete the following reaction :

${\left({\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\right)}_2\mathrm{Cd}+2{\mathrm{CH}}_3\mathrm{COCl}$

How will you prepare the following compound from benzene? You may use any inorganic reagent and any organic reagent having not more than one carbon atom: p-NitrobenzaIdehyde.

Write the structures of products of the following reaction:

${\mathrm{H}}_3\mathrm{C}-\mathrm{C}\equiv \mathrm{C}-\mathrm{H}\stackrel{\mathrm{H}{\mathrm{g}}^{2+}, {\mathrm{H}}_2\mathrm{S}{\mathrm{O}}_4}{\to }$

In the reaction,

$\mathrm{Ph}-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3\stackrel{{\mathrm{H}}_3{\mathrm{O}}^{+}/{\mathrm{HgSO}}_4}{\to }\mathrm{A}$,

A is

Write the structures of products of the following reaction:

${\left({\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}{\mathrm{H}}_2\right)}_2\mathrm{C}\mathrm{d}+2\mathrm{C}{\mathrm{H}}_3\mathrm{C}\mathrm{O}\mathrm{C}\mathrm{l}\mathrm{}⟶$

Write the structures of products of the following reaction: