Chemical Reactions of Haloalkanes

What is the order of reactivity of following compounds towards  $S_N{}^1$ substitutions reaction.
(i) 

(ii) 

(iii) 

What is the order of reactivity of following compounds towards  ${\mathrm{S}}_{\mathrm{N}}1$ substitution reaction.

Which one of the following two substances undergoes ${\mathrm{S}}_{\mathrm{N}}1$ reaction faster?

(i)    or   (ii) 

An S_N2 reaction at an asymmetric carbon of a compound always gives:

A solution of (+) -2-chloro-2-phenylethane in toluene racemises slowly in the presence of small amount of  $SbC{l}_5$ , due to the formation of –

A solution of (+) -2-chloro-1-phenylethane in toluene racemises slowly in the presence of small amount of  ${\mathrm{SbCl}}_5$, due to the formation of:

${\left(C{H}_3\right)}_{3}CMgCl$  on treatment with  $D_{2}O$  produces –

${\left({\mathrm{CH}}_3\right)}_3\mathrm{CMgCl}$ on treatment with ${\mathrm{D}}_2\mathrm{O}$ produces:

The major product of the following reaction is

The following compounds are given to you:

(i). $2-$Bromopentane

(ii). $2-$ Bromo $-2-$ methyl butane

(iii).$1-$Bromopentane.

Which compound is most reactive towards elimination reaction and why ?

In the reaction, ${\mathrm{CH}}_3\mathrm{Br} \stackrel{\mathrm{KCN}}{⟶} \mathrm{A} \stackrel{{\mathrm{H}}^{+}}{\to } \mathrm{B} \stackrel{{\mathrm{LiAlH}}_4}{⟶} \mathrm{C}$

The product C is.

In the following question a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: $\mathrm{KCN}$ reacts with methyl chloride to give methyl isocyanide.
Reason: ${\mathrm{CN}}^{–}$ is an ambident nucleophile.

Match the alkyl halide reacting with reagent given in Column $\mathrm{I}$ with their respective substituted product given in  Column $\mathrm{II}$ and choose the correct option from the codes given below: 

Discuss how alkyl cyanides and alkyl nitrites are formed.

Define ambident nucleophiles? Give an example of it.

Which of the given options shows the correct product of the reaction, $\mathrm{MeCl}+\mathrm{RNa}⟶?$