Hydrogen combines with other elements by

The hydride that is $NOT$ electron deficient is

Which compound is formed on catalytic hydrogenation of carbon monoxide at high $p$ and high $T$ in the presence of $ZnO-Cr_2O_3$ catalyst?

Hydrogen burns in air with a

$H_2S$ reacts with $O_2$ to form:

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