Explain 'Bouveault-Blanc reduction'.

 the reactant $\mathrm{A}$ is:

cannot be prepared by:

In the following reaction sequence: 

Compound $\mathrm{I}$ is

Consider the following sequence of reactions.

 $\mathrm{Z}\stackrel{{\mathrm{PCl}}_5}{\to }\mathrm{X}\stackrel{\mathrm{Alc}.\mathrm{KOH}}{\to }\mathrm{Y}\underset{2{\mathrm{H}}_2\mathrm{O}/\mathrm{\Delta }}{\overset{\mathrm{Conc}.{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}\mathrm{Z}$

$\text{'}\mathrm{Z}\text{'}$ is

The product $\left(\mathrm{R}\right)$ of the following reaction sequence is

The major product of the following reaction is

$\underset{ \mathrm{ii}. {\mathrm{H}}_2\mathrm{O}}{\overset{ \mathrm{i}.\mathrm{LiAlH}{ }_4}{\to }}$

ldentify the alkene which will not provide the following alcohol upon oxymercuration demercuration.

In the given reactions $\mathrm{M}$ is the number of major products obtained in ${\mathrm{I}}^{\mathrm{st}}$ reaction and $\mathrm{N}$ number of major products obtained in ${\mathrm{II}}^{\mathrm{nd}}$ reaction. Report your answer as $\mathrm{MN}$. .

(i) 

(ii)