Which of the following compounds would undergo $S_N1$ reaction faster and why?
$(A)$ Cyclohexylmethyl chloride
$(B)$ Benzyl chloride

Consider the reaction shown below. The number of $\pi$ electrons present in the major product '$P$' is ...... .

The hydrolysis of $2$-bromo-$3$-methylbutane by the $S_N1$ mechanism primarily yields:

$1,2-\text{dichloroethane} + NaSCH_2CH_2SNa \to C_4H_8S_2 + (P)$
Unknown product $(P)$ of the above reaction is

The decreasing order of reactivity towards dehydrohalogenation $(E_1)$ reaction of the following compounds is:
$(A)$ $CH_3CH_2CH_2CH_2Cl$
$(B)$ $CH_2=CHCH_2CH_2Cl$
$(C)$ $CH_3CH_2CHClCH_3$
$(D)$ $CH_2=CHCHClCH_3$

Identify reagent $B$ in the following reaction: $R - X \xrightarrow{B} \text{Nitroalkane}$