$H_2 + CO +$ alkene $\xrightarrow{\text{catalyst}} 1^\circ$ alcohol. What is the stable intermediate and the nature of the reaction?

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

$CH_3COCl \xrightarrow{Pd/BaSO_4, H_2} CH_3CHO + HCl$
The above reaction is called:

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 | $(IV)$ $H_2, Pd-BaSO_4$ |

Write the chemical reactions for the following conversions:
$1.$ $2$-Chloropropane to Propanone
$2.$ Propene to Propanone

Which of the following sets of reagents convert toluene to benzaldehyde?
$A$. $Cl_2 / h\nu ; H_2O, \Delta$
$B$. $Cl_2 / Fe ; H_2O$
$C$. $KMnO_4 / OH^{-} ; H^{+}$
$D$. $CrO_2Cl_2 / CS_2 ; H_3O^{+}$