Identify the correct composition of water gas from the following.

Which of the following is an example of an interstitial hydride?

Observe the following reactions:
$I$. $CO_{(g)} + H_{2(g)} \xrightarrow{X} HCHO_{(g)}$
$II$. $CO_{(g)} + 3 H_{2(g)} \xrightarrow{Y} CH_{4(g)} + H_2O_{(g)}$
The catalysts $X$ and $Y$ in the above reactions are respectively:

If an isotope of hydrogen has two neutrons in its atom,its atomic number and atomic mass number will respectively be

The synonym for water gas when used in the production of methanol is:

How do you expect the metallic hydrides to be useful for hydrogen storage? Explain.