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 ______.

Ether which is liquid at room temperature is _____.

Select the ether among the following that yields methanol as one of the products on reaction with cold hydroiodic acid.

Reaction of which among the following ethers with $\mathrm{HI}$ in cold leads to formation of methyl alcohol?

Tert-butyl methyl ether on treatment with hydrogen iodide in cold gives ______.

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

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