In the Rosenmund's reduction,$BaSO_4$ taken with catalyst $Pd$ acts as

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

The reduction reaction shown is known as:

What are $X$ and $Y$ in the following reaction sequence?
$C_5H_{12}O$ $\xrightarrow[573 \ K]{Cu} C_5H_{10}$ $\xrightarrow[\text{(ii) } Zn/H_2O]{\text{(i) } O_3} X + Y$

Consider the following reaction, and choose the correct option.
$Toluene \xrightarrow[ii. H_3O^+]{i. CrO_2Cl_2, CS_2} P$

The intermediate compound $X$ in the following chemical reaction is :