Which among the following halide$(s)$ will not show $S_{N}1$ reaction:
$(A)$ $H_2C=CH-CH_2Cl$
$(B)$ $CH_3-CH=CHCl$
$(C)$ $C_6H_5CH_2Cl$
$(D)$ $(CH_3)_2CHCl$
Choose the $most\ appropriate$ answer from the options given below:

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

The following bimolecular elimination reaction $(E_2)$ is carried out with different halogen leaving groups. The per cent yield of the two products ($2$-hexene and $1$-hexene) for each leaving group is listed below.

Leaving group	Conj. Acid $pK_a$	$\%$-yield of $2$-hexene	$\%$-yield of $1$-hexene
$X = I$	$-10$	$81\%$	$19\%$
$X = Br$	$-9$	$72\%$	$28\%$
$X = Cl$	$-7$	$67\%$	$33\%$
$X = F$	$3.2$	$30\%$	$70\%$

Which of the following statement$(s)$ is/are true concerning this series of $E_2$ reactions?

Compound $(A), \, C_8H_9Br,$ gives a white precipitate when warmed with alcoholic $AgNO_3.$ Oxidation of $(A)$ gives an acid $(B), \, C_8H_6O_4.$ $(B)$ easily forms anhydride on heating. Identify the compound $(A).$

The major product of the following reaction is:

Which one of the following compounds is most reactive towards $S_N1$ reaction?