Identify the product when magnesium burns in air.

$A$ chemical $A$ is used for the preparation of washing soda to recover ammonia. When $CO_2$ is bubbled through an aqueous solution of $A$,the solution turns milky. It is used in white washing due to its disinfectant nature. What is the chemical formula of $A$?

In which of the compounds does hydrogen have an oxidation state of $-1$?

The solution of sodium metal in liquid ammonia is strongly reducing due to the presence of which of the following in the solution?

Which of the following metals produces hydrogen gas when heated with hot concentrated alkali?

The element whose salts cannot be detected by flame test is