The hydrides of which group elements of the periodic table form electron-precise hydrides?

Lithium hydride can be used to prepare other useful hydrides. Beryllium hydride is one of them. Suggest a route for the preparation of beryllium hydride starting from lithium hydride. Write chemical equations involved in the process.

In the synthesis of which compound is water gas used?

Hydrogen has three isotopes $(A)$,$(B)$ and $(C)$. If the number of neutron$(s)$ in $(A)$,$(B)$ and $(C)$ respectively,are $(x)$,$(y)$ and $(z)$,the sum of $(x)$,$(y)$ and $(z)$ is:

When steam is passed over red hot iron,the substances formed are

Which of the following forms of hydrogen emits low energy $\beta^{-}$ particles?