Metals like $Pt$ and $Pd$ can adsorb large volumes of hydrogen under specific conditions. Such adsorbed hydrogen by the metal is known as:

Give the uses of $Dihydrogen$.

The isotopes of hydrogen are

Which of the following cannot be used for the preparation of $H_2$?

Which of the following is an ionic hydride?

Identify the correct statements from the following.
$(i)$ $Zn$ reacts with dilute $HCl$ and aqueous $NaOH$ solution separately and liberates hydrogen.
$(ii)$ $Ti$ and $Zr$ form interstitial hydrides.
$(iii)$ The viscosity of $H_2 O$ is more than the viscosity of $D_2 O$.