Calcium acetate,on heating,gives:

Match the following:
| List-$I$ | List-$II$ |
| :--- | :--- |
| $(A)$ Acid chloride to aldehyde | $(I)$ $DIBAL-H$ |
| $(B)$ Benzene to benzaldehyde | $(II)$ $CO, HCl, \text{anhyd. } AlCl_3$ |
| $(C)$ Acetylene to aldehyde | $(III)$ $HgSO_4, H_2SO_4$ |
| $(D)$ Ester to aldehyde | $(IV)$ $H_2, Pd-BaSO_4$ |

The major product obtained in the reaction of bromobenzene with $Mg$ in dry ether followed by the reaction with benzonitrile and hydrolysis is

Conversion of benzene to acetophenone can be brought about by

Which of the following catalysts is used in the Rosenmund reaction?

Identify the product $(A)$ in the following reaction:
$4-\text{tert-butylcyclohexanol} + \text{PCC} \xrightarrow{\text{CH}_2\text{Cl}_2} (A)$