Isopropyl methyl ether when treated with cold hydrogen iodide gives ______.

The heating of phenyl-methyl ether with $\mathrm{HI}$ produces _____.

Diethyl ether, when heated with excess $\mathrm{HI}$ produces _____.

The ether that undergoes electrophilic substitution reaction is ______.

Which is used as a solvent during reactions with Grignard reagent?

Crown ethers are named as $\mathrm{X}$-crown-$\mathrm{Y}$. In the following crown ether, $\mathrm{X}$ and $\mathrm{Y}$ are respectively ______.

$2, 2-$Dichlorobutane on boiling with aqueous $\mathrm{KOH}$ gives$-$

Identify $\mathrm{Z}$ in the sequence of reactions:

${\mathrm{CH}}_{\mathrm{3}}{\mathrm{CH}}_{\mathrm{2}}\mathrm{CH}={\mathrm{CH}}_{\mathrm{2}}\mathrm{ }\stackrel{\mathrm{HBr}/{\mathrm{H}}_{\mathrm{2}}{\mathrm{O}}_{\mathrm{2}}}{\to } \mathrm{Y} \stackrel{{\mathrm{C}}_{\mathrm{2}}{\mathrm{H}}_{\mathrm{5}}\mathrm{ONa}}{\to } \mathrm{Z}$

Phenol in presence of sodium hydroxide reacts with chloroform to form salicylaldehyde. The reaction is known as _____.