What is formed when toluene reacts with chlorine in the presence of light?

Monohalides on reacting with alcoholic $KOH$ give

Which of the following is most reactive towards dehydrohalogenation?

The rate of reaction of $t-$butyl bromide and $NaOH$ in water depends on the concentration of

Given below are two statements: one is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$ :
Assertion $(A)$ : $S_N2$ reaction of $C_6H_5CH_2Br$ occurs more readily than the $S_N2$ reaction of $CH_3CH_2Br$.
Reason $(R)$ : The partially bonded unhybridized $p$-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring.
In the light of the above statements,choose the most appropriate answer from the options given below:

The relative reactivity of
$(I)$ Benzyl chloride
$(II)$ $p$-methoxy benzyl chloride
$(III)$ $p$-Nitrobenzyl chloride
Towards $S_N^1$ reaction follows the order