An organic compound X with molecular formula ${\mathrm{C}}_6{\mathrm{H}}_{10},$ when treated with $\mathrm{HBr},$  forms a gem dibromide. The compound X upon warming with ${\mathrm{HgSO}}_4$ and dil. ${\mathrm{H}}_2{\mathrm{SO}}_4,$  produces a ketone, which gives a positive iodoform test. The compound X is

In the compound, 

$\underset{\left(\mathrm{I}\right)}{{\mathrm{CH}}_2}=\underset{\left(\mathrm{II}\right)}{\mathrm{CH}}-\mathrm{C}\underset{\left(\mathrm{III}\right)}{\equiv \mathrm{CH}}$

The most acidic hydrogen atom is

The major product in the following reactions is

${\mathrm{C}}_6{\mathrm{H}}_5-\mathrm{C}\equiv \mathrm{CH}\underset{\left(\mathrm{ii}\right)\mathrm{HI}\left(1\mathrm{eq}\right)}{\overset{\left(\mathrm{i}\right)\mathrm{HCl}\left(1\mathrm{eq}\right)}{\to }}$

Which among the following depicts the correct order of acidity?

The correct sequence of reagents for the following conversion will be

The major product of the following reaction is

In the reaction


$\mathrm{x}$ and $\mathrm{y}$ , respectively, are

Match List$-\mathrm{I}$ with List$-\mathrm{II}:$

Choose the most appropriate match