What is the product $(B)$ of the following reaction sequence?

The reaction involving the coupling of an aryl halide and an alkyl halide in the presence of sodium metal and dry ether is known as:

In the reaction of $1$-vinyl-$-2$-bromoethylbenzene with $HBr$,the major product is:

Which one is liquid at room temperature?

The $S_{N}2$ reaction mechanism proceeds through ........

Match the following reactants with their corresponding products:
Reactants:
$(A)$ $C_2H_5Cl$,moist $Ag_2O$
$(B)$ $C_2H_5Cl$,ethanolic $AgCN$
$(C)$ $C_2H_5Cl$,ethanolic $AgNO_2$
$(D)$ $C_2H_5Cl$,ethanolic $KOH$
Products:
$(i)$ $CH_3CH_2ONO$
$(ii)$ $C_2H_4$
$(iii)$ $CH_3CH_2OH$
$(iv)$ $CH_3CH_2NC$
Select the correct match: