Identify the compound which gives $CO_2$ more readily on heating.

The compound which is not associated with the Solvay ammonia process for the production of $Na_2CO_3$ is:

Which of the following is a good reducing agent?

$A$ metal $M$ on heating in nitrogen gas gives $Y$. $Y$ on treatment with $H_2O$ gives a colourless gas which when passed through $CuSO_4$ solution gives a blue colour. $Y$ is

$A$ metal on combustion in excess air forms $X$. $X$ upon hydrolysis with water yields $H_2O_2$ and $O_2$ along with another product. The metal is

Identify the correct statement regarding elemental sodium.