In the reaction $CH_3CN + 2H \underset{\text{Ether}}{}$ ${\xrightarrow{HCl}} X$ $\xrightarrow{\text{Boiling } H_2O} Y$; the product $Y$ is

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

Identify the product $(A)$ in the following reaction:
$4-\text{tert-butylcyclohexanol} + \text{PCC} \xrightarrow{\text{CH}_2\text{Cl}_2} (A)$

What is the reaction called in which toluene is oxidized to benzaldehyde in the presence of chromyl chloride?

Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?

Identify $Z$ in the following sequence of reactions.
$C_2H_4Br_2$ $\xrightarrow[\text{(ii) } NaNH_2]{\text{(i) alc- } KOH} X$ $\xrightarrow[\text{Red hot}]{\text{Fe tube, } 873 \ K} Y$ $\xrightarrow[\Delta]{\left(CH_3CO\right)_2O / \text{Anhyd-} AlCl_3} Z$