The organic halide,which does not undergo hydrolysis by $S_{N}1$ mechanism is

Which is the main organic product obtained by the reaction of $2,2,2-$trichloroethanol with calcium hydroxide?

Consider the following bromides.
The correct order of $S_N1$ reactivity is

In the following reactions,
$(i) CH_3-CH(CH_3)-CH(OH)-CH_3 \xrightarrow{H^{+}/\text{heat}} A \text{ [Major product]} + B \text{ [Minor product]}$
$(ii) A$ $\xrightarrow[\text{in absence of peroxide}]{HBr, \text{dark}} C \text{ [Major product]} + D \text{ [Minor product]}$
the major products $(A)$ and $(C)$ are respectively:

The correct order of reactivity of $CH_3Br$ in methanol with the following nucleophiles is:
$F^{-}, I^{-}, C_2H_5O^{-}$ and $C_6H_5O^{-}$

The total number of optically active compounds formed in the following reaction is
$CH_3CH_2C(CH_3)=CHOCH(CH_3)_2$ $\xrightarrow{HBr}$