Hydrogen readily combines with metals and thus shows its

State the abundance and symbol of protium and deuterium in hydrogen atoms.

Given below are two reactions involved in the commercial production of dihydrogen $(H_2)$. The two reactions are carried out at temperatures $T_1$ and $T_2$ respectively:
$C_{(s)} + H_2O_{(g)} \xrightarrow{T_1} CO_{(g)} + H_{2(g)}$
$CO_{(g)} + H_2O_{(g)} \xrightarrow{T_2} CO_{2(g)} + H_{2(g)}$
The temperatures $T_1$ and $T_2$ are correctly related as:

Which of the following is commonly used in a laboratory desiccator?

Which is an example of a molecular hydride?

On reaction with $Mg$,very dilute nitric acid produces