$2,2-$dichloro propane on hydrolysis yields

The major final product in the following reaction is $CH_3CH_2CN \xrightarrow[(ii) \ H_3O^{+}]{(i) \ CH_3MgBr}$

Identify the product $Y$ in the following series of reactions.
$4-$Nitrotoluene $\xrightarrow[(CH_3CO)_2O / CrO_3]{273-278 \ K} X$ $\xrightarrow{H_3O^{+} / \Delta} Y$

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

Identify the product formed when benzoyl chloride is reduced by hydrogen using a palladium catalyst poisoned with barium sulphate.

Identify the compound $C$ in the following sequence:
$(CH_3)_2CHCH_2C \equiv N$ $\xrightarrow{HCl, H_2O} \text{compound } A$ $\xrightarrow[2. H_2O]{1. LiAlH_4} \text{compound } B$ $\xrightarrow{PCC, CH_2Cl_2} \text{compound } C$