Which of the following reacts with a solution of caustic soda upon heating to produce a combustible gas?

Explain the properties of sodium carbonate.

When burnt in excess of oxygen, sodium forms a compound $X$ and potassium forms a compound $Y$. The magnetic natures of $X$ and $Y$ respectively are

The element with atomic number $55$ belongs to

The solution of sodium metal in liquid ammonia is a strong reducing agent due to the presence of:

On heating quick lime with coke in an electric furnace,we get