In the following reaction,product $P$ is: $RCOCl \xrightarrow{H_2, Pd-BaSO_4} P$

Which of the following methods can be used to prepare acetophenone?

Which of the following gives an aldehyde on dry distillation?

Which of the following reactions can be used to prepare acetophenone?

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 $P$.

What are $X$ and $Y$ in the following reactions?