Embibe Experts Solutions for Chapter: Haloalkanes and Haloarenes, Exercise 4: Exercise-4

The number of transition states in an unimolecular nucleophilic substitution (${\mathrm{S}}_{\mathrm{N}}1$) reaction is:

The sequence of steps involved in aromatic nucleophilic substitution involving a benzyne intermediate is:

The compound which undergoes hydrolysis on just warming with water and forms the corresponding hydroxyl derivative is:

$\left(\mathrm{i}\right)$ chlorobenzene is mono-nitrated to $\mathrm{M}$.
$\left(\mathrm{ii}\right)$ nitrobenzene is mono-chlorinated to $\mathrm{N}$.
$\left(\mathrm{iii}\right)$ anisole is mono-nitrated to $\mathrm{P}$.
$\left(\mathrm{iv}\right)$ $2-$nitrochlorobenzene is mono-nitrated to $\mathrm{Q}$.

Out of $\mathrm{M}, \mathrm{N}, \mathrm{P}$ and $\mathrm{Q}$, the compound that undergoes reaction with aqueous $\mathrm{NaOH}$ the fastest is:

The compound that undergoes solvolysis in aqueous ethanol most easily is:

The best reaction sequence to convert $2-$methyl$-1-$bromopropane into $4-$methyl$-2-$bromopentane is:

The compound that will not react with hot concentrated aqueous alkali at atmospheric pressure is:

Match List $\mathrm{I}$ (Reaction) with List $\mathrm{II}$ (Mechanism) and select the correct answer using the code given below the lists:

	List I		List II
P		1	${\mathrm{S}}_{\mathrm{N}}1$
Q		2	${\mathrm{S}}_{\mathrm{N}}2$
R		3	${\mathrm{S}}_{\mathrm{N}}\mathrm{i}$
S		4	${\mathrm{S}}_{\mathrm{N}}2\mathrm{Ar}$