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

Consider the following reaction. Which of the following bases will give the best yield of the alkene $(II)$ as the major product?

$CH_3-CH_2-Cl + NaI \xrightarrow{\text{Acetone}} CH_3-CH_2-I + NaCl$ The above reaction is known as $:-$

Consider the above chemical reaction. Product $A$ is:

$A$ primary alkyl halide $(a)$ with molecular formula $C_{4}H_{9}Br$ reacts with alcoholic $KOH$ to give compound $(b)$. Compound $(b)$ reacts with $HBr$ to give compound $(c)$,which is an isomer of $(a)$. When $(a)$ reacts with sodium metal,it gives compound $(d)$ with molecular formula $C_{8}H_{18}$,which is different from the compound formed when $n$-butyl bromide reacts with sodium. Identify the structural formula of $(a)$ and write the equations for all the reactions.

In the given reaction $3-$Bromo$-2,2-$dimethylbutane $\xrightarrow{C_2H_5OH}$ (Major product) $'A'$. Product $A$ is: