Monochlorination of toluene in the presence of sunlight followed by hydrolysis gives:

Which of the following is least reactive towards $SN^{1}$ reactions?

Which of the compounds will react faster in an $S_N1$ reaction?
$CH_3-CH_2-Cl$ and $C_6H_5-CH_2-Cl$

Iodoform on heating with $KOH$ gives

$KCN$ reacts readily to give a cyanide with:

Arrange the following compounds in order of decreasing rate of hydrolysis for $SN_1$ reaction:
$(I)$ $C_6H_5CH_2Br$
$(II)$ $p-CH_3-C_6H_4-CH_2Br$
$(III)$ $p-(CH_3)_2CH-C_6H_4-CH_2Br$
$(IV)$ $p-CH_3CH_2-C_6H_4-CH_2Br$