Hydrogen acts as a reducing agent and thus resembles

Which one of the following properties is generally not applicable to ionic hydrides?

Hydrogen can be prepared by the action of dil. $H_2SO_4$ on

Ionic hydrides are usually

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

When $NaBH_4$ is dissolved in water,