Consider the following reaction:
$C_6H_5COCl \xrightarrow{H_2, Pd/BaSO_4} A$
The product $A$ is:

An organic compound $X$ gives a red precipitate on heating with Fehling's solution. Which one of the following reactions yields $X$ as a major product?

What are $A$ and $B$ in the following reaction sequence?
$\text{Propionitrile} + A$ $\longrightarrow B$ $\xrightarrow{H_3O^{+}} \text{propiophenone}$

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

The oxidation of toluene to benzaldehyde by chromyl chloride $(CrO_2Cl_2)$ is called:

In the reaction $\underset{\text{(Vapour)}}{C_2H_5OH} \xrightarrow[300^{\circ}C]{Cu} X$. The molecular formula of $X$ is