The major product formed when $2$-bromo-$2$-methylbutane is refluxed with ethanolic $\mathrm{KOH}$ is

Which of the following organohalogen compounds when heated with alcoholic potassium hydroxide does not undergo dehydrohalogenation reaction?

What is the major product P in the above reaction?

In the reaction below, X is 

Neopentyl alcohol $\stackrel{{\mathrm{H}}_2{\mathrm{SO}}_4}{\to }$ X

The main product of the following reaction is

${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{CH}}_2\mathrm{CH}\left(\mathrm{OH}\right)\mathrm{CH}({\mathrm{CH}}_3{)}_2 \stackrel{\mathrm{Conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }$

Cyclohexene is best prepared from cyclohexanol by which of the following