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

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

Hydrogen and deuterium differ in

Which of the following reactions give $H_2$ as one of the products? (Reactions are not balanced)
$I) NaBH_4 + I_2 \longrightarrow$
$II) B_2H_6 + N(CH_3)_3 \longrightarrow$
$III) Al + NaOH + H_2O \longrightarrow$
$IV) BF_3 + NaH \longrightarrow$

Which of the following elements forms a covalent electron-deficient hydride?

Identify the catalyst used to transform carbon monoxide from water gas into carbon dioxide.