What is the product obtained when $2-$methylpropene is heated with acetyl chloride in the presence of anhydrous $ZnCl_2$?

In the given pairs of alkyl halides,in which pair is the first compound more reactive than the second compound toward $S_N2$ reaction?

Explain: Whether a haloalkane undergoes an elimination reaction or a substitution reaction.

Among the following chlorides, the compounds which will be hydrolysed most easily and most slowly in aqueous $NaOH$ solution are respectively:
$1$. Methoxymethyl chloride $(CH_3OCH_2Cl)$
$2$. Benzyl chloride $(C_6H_5CH_2Cl)$
$3$. Neopentyl chloride $((CH_3)_3CCH_2Cl)$
$4$. Propyl chloride $(CH_3CH_2CH_2Cl)$

Haloalkanes react with $KCN$ to form alkyl cyanides as the main product,while $AgCN$ forms isocyanides as the chief product. Explain.

The reaction of $n$-propyl bromide with alcoholic potassium hydroxide $(KOH)$ produces ...........