Phenol on distillation with zinc dust gives _____.

In Friedel-Craft's acylation, besides ${\mathrm{AlCl}}_{\mathrm{3}}$, the other reactants are ______.

Which of the following is a simple ether?

Name of ${({\mathrm{CH}}_{\mathrm{3}}\mathrm{)}}_{\mathrm{2}}\mathrm{CH}-{\mathrm{CH}}_{\mathrm{2}}-{\mathrm{CH}}_{\mathrm{2}}-{\mathrm{CH}}_{\mathrm{3}}$ is ______.

The compound which is not isomeric with diethyl ether is ______.

The molecular formula of compound is ${\mathrm{C}}_{\mathrm{4}}{\mathrm{H}}_{\mathrm{10}}\mathrm{O}$, it represents three isomers, then the type of isomerism is _____.

Conc. ${\mathrm{H}}_{\mathrm{2}}{\mathrm{SO}}_{\mathrm{4}}$ heated with excess of ${\mathrm{C}}_{\mathrm{2}}{\mathrm{H}}_{\mathrm{5}}\mathrm{OH}$ at $140°\mathrm{C}$ forms ______.

In which case methyl-tert-butyl ether is formed?

An organic compound 'A' reacts with sodium metal and forms 'B'. On heating with conc. ${\text{H}}_{\text{2}}{\text{SO}}_{\text{4}}$, 'A' gives diethyl ether. 'A' and 'B' are ______.