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

Which of the following pairs of reactions give $H_2$ gas as a product upon hydrolysis?

What is Carbogen?

On passing electric current over molten ionic hydrides of $s-$block elements,

Which of the following processes does not involve the use of dihydrogen?

How many of the following statements is/are correct?
$(a)$ Mercury is the only metal that exists as liquid at room temperature.
$(b)$ Among non-metals,carbon has the highest melting point.
$(c)$ Hydrogen is the most abundant element in the universe.
$(d)$ Oxygen is the most abundant element in the earth's crust.