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

Explanation

Metallic hydrides can be used as hydrogen storage. This is because in metallic hydrides, hydrogen is absorbed as H-atoms. Due to inclusion of H-atoms, the metal lattice expands and therefore becomes less stable. Therefore, when metallic hydride is heated, it decomposes to form hydrogen and very finely divided metal.
The hydrogen thus produced can be used as a fuel. Thus transition metals or their alloys can be used to store and transport hydrogen to be used as a fuel. This is called hydrogen economy.