The correct order of boiling points of alkyl halides is:

Tertiary alkyl halides are practically inert to substitution by $S_N2$ mechanism because of:

The order of reactivity of the following compounds towards dilute aqueous $KOH$ in $SN_1$ reaction is
$I$. $CH_3CH_2CH_2CH_2Br$
$II$. $CH_3CH_2CHBrCH_3$
$III$. $(CH_3)_2CHCH_2Br$
$IV$. $(CH_3)_3CBr$

Identify the correct decreasing order of ease of dehydrohalogenation of alkyl halides.

What is the product of the following $S_N2$ reaction?

Which of the following is most reactive towards $S_{N}1$ reaction?