The given reaction is: $C_6H_5COCl + H_2 \xrightarrow{Pd/BaSO_4} C_6H_5CHO + HCl$

$CH_3-CO-CH_2-COOH \xrightarrow{\Delta} X$; $X$ can also be formed by

For the reaction sequence: $P$ $\xrightarrow[2. H_3O^+]{1. CH_3MgBr} R$ $\xrightarrow[2. \Delta]{1. \text{dil. } NaOH} \text{4-methylpent-3-en-2-one}$,identify $P$.

In the reaction $CH_3CN + CH_3MgI \to A \xrightarrow{H_2O/H^{+}} B$,the compound $B$ is

Which of the following reactions is an example of Rosenmund reduction?

$2,2-$dichloro propane on hydrolysis yields