A metallic carbide on reaction with water gives a colourless gas, which burns readily in air and gives a precipitate with ammonical silver nitrate solution. What is the gas evolved in reaction?

Which among the following depicts the correct order of acidity?

The major product of the following reaction is

For the given reaction:

What is $\mathrm{A}$?

In the following reaction sequence



X and Y are, respectively

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

What is the final major product of the following reaction?