Saline hydrides react explosively with water. Such fires can be extinguished by:

Atomic hydrogen combines with almost all elements but molecular hydrogen does not. Explain.

Which of the following is commonly used in a laboratory desiccator?

Comment on the reactions of dihydrogen with $(i)$ chlorine,$(ii)$ sodium,and $(iii)$ copper $(II)$ oxide.

Assertion : Hydrogen combines with other elements by losing,gaining or sharing of electrons.
Reason : Hydrogen forms electrovalent and covalent bonds with other elements.

$LiAlH_4$ is obtained by reacting an excess of $LiH$ with an ethereal solution of $AlCl_3$. Identify the reactant that is used in excess.