Which of the following metals forms an amphoteric oxide?

When sodium is heated at $300\,^oC$,it forms $X$. It absorbs $CO_2$ to form $Na_2CO_3$ and $Y$. What is $Y$?

Why do the alkali metals and their salts impart a characteristic color to an oxidizing flame?

When a moderate amount of sodium metal is dissolved in liquid ammonia at low temperature,which of the following is $NOT$ obtained?

Which one of the following statements is not correct?

What are the products formed when $Li_2CO_3$ undergoes thermal decomposition?