Which among the following alkyl halides gives more than one product upon dehydrohalogenation?

The decreasing order of reactivity towards $S_N 1$ reaction for the following compounds is:

The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is:

Isopropyl chloride undergoes hydrolysis by which mechanism?

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:

Which is the correct reactivity order for $E_2$ reaction with alcoholic $KOH$?