Ethyl methyl ether, ${\mathrm{CH}}_3-\mathrm{O}-{\mathrm{C}}_2{\mathrm{H}}_5,$ is used as an anaesthetic. Formula for corresponding thioether would be:-

Which of the following is not a resonating structure for the phenoxide ion?

(major), $\mathrm{P}$ is

The major product in the following reaction is:

ldentify the alkene which will not provide the following alcohol upon oxymercuration demercuration.

The major product of the following reaction is:

${\left({\mathrm{CH}}_3\right)}_2\mathrm{C}=\mathrm{CH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3\stackrel{\left(\mathrm{i}\right) {\mathrm{B}}_2{\mathrm{H}}_6,\mathrm{ether} \left(\mathrm{ii}\right) {\mathrm{H}}_2{\mathrm{O}}_2,\mathrm{NaOH}}{\to }$

The product obtained from the following sequence of reactions is:

${\mathrm{H}}_3\mathrm{C}-\mathrm{C}\equiv \mathrm{CH}\frac{{\mathrm{HgSO}}_4}{{\mathrm{H}}_2{\mathrm{SO}}_4}\mathrm{A}\stackrel{{\mathrm{NaBH}}_4}{⟶}\mathrm{B}$