Aspirin is obtained by the reaction of ${\mathrm{CH}}_3\mathrm{COCl}$ with

Effervescence takes place when sodium carbonate solution is added to

An example of a compound with a functional group $-\mathrm{O}-$ is

The central oxygen atom in ether is

The reaction ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{ONa}+{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{I}⟶{\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{OC}}_2{\mathrm{H}}_5+\mathrm{NaI}$ is called

Diethyl ether on heating with excess of $\mathrm{HI}$ yields

When diethyl ether is heated with conc. sulphuric acid under pressure, it forms

When vapour of ethyl alcohol are passed over ${\mathrm{Al}}_2{\mathrm{O}}_3$ at $250°\mathrm{C}$, it forms

Tert. butyl chloride on treatment with sodium alkoxide yield