The compound added to prevent chloroform from forming phosgene gas is

By passing excess $Cl_{2(g)}$ in boiling toluene, which one of the following compounds is exclusively formed?

The reaction of $C_6H_5CH=CHCH_3$ with $HBr$ produces

Alkyl halides react with $Mg$ in dry ether to form

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:

$A$ mixture of $1-$chloropropane and $2-$chloropropane when treated with alcoholic $KOH$ gives: