Convert ethanol to acetaldehyde.

Give one method each for the industrial preparation of:

ethyl alcohol

Give one method for the industrial preparation of phenol.

What is the action of ${\mathrm{HNO}}_3$ in presence of conc ${\mathrm{H}}_2{\mathrm{SO}}_4$ on phenol?

What is the action of each of the following on phenol?

${\mathrm{Br}}_2$ in presence of ${\mathrm{CS}}_2$ at $278 \mathrm{K}$

What is the action of each of the following on phenol?

${\mathrm{CO}}_2$ at $400 \mathrm{K}$ and $4/7$ atm. pressure.

Account for the following:

In reaction involving cleavage of carbon-oxygen bond of alcohols some acid is added to facilitate the reaction.

Account for the following:

The order of reactivity of halogen acids with alcohols is $\mathrm{HI}>\mathrm{HBr}>\mathrm{HCl}$.

Account for the following:

Phenols do not undergo substitution at the carbon of  bond.