Which among the following is/are primary component$(s)$ of the synthesis gas?

Name the classes of hydrides to which $H_2O$,$B_2H_6$ and $NaH$ belong.

Write a note on metallic or non-stoichiometric hydrides.

Which of the following is expected to be higher for a proton $(H^+)$ compared to other ions?

How can $D_2O$ be prepared from water? Mention the physical properties in which $D_2O$ differs from $H_2O$. Give at least three reactions of $D_2O$ showing the exchange of hydrogen with deuterium.

Which property among the following is the same for both hydrogen and deuterium molecules?