Which of the following reactants will not favour nucleophilic substitution reaction?

Write the products of the following reactions:
$(i)$ $C_6H_5CH=CH_2 + HBr \rightarrow$
(ii) $CH_3-CH_2-CH=CH_2 + HCl \rightarrow$
(iii) $C_6H_5CH_2-CH=CH_2 + HBr \xrightarrow{\text{Peroxide}}$

The major product obtained in the following reaction is $C_2H_5ONa + (CH_3)_3C-Cl \rightarrow$

Identify the product $B$ in the following reaction sequence:
$1$-bromo-$4$-chlorobenzene $\xrightarrow[\text{Dry ether}]{Mg (1 \text{ equivalent})} (A)$ $\xrightarrow{HO-CH_2-CH_2-Cl} (B)$

The correct order of boiling points of alkyl halides is:

Identify the correct order of reactivity for the reaction with alcoholic $KOH$ for the following compounds:
$(a)$ $2$-bromo-$2,3$-dimethylbutane
$(b)$ $2$-chlorobutane
$(c)$ $2$-bromobutane
$(d)$ $1$-bromopropane