${\mathrm{Al}}_4{\mathrm{C}}_3$, ${\mathrm{Mg}}_2{\mathrm{C}}_3$ and ${\mathrm{CaC}}_2$ are separately treated with water. The organic products formed respectively, are -

The major product of the following reaction is

In the reaction


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

The correct sequence of reagents for the following conversion will be

Which among the following depicts the correct order of acidity?

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

In the following reaction sequence



X and Y are, respectively