What do you understand by the term 'non stoichiometric hydrides? Do you expect this type f hydrides to be formed by alkali metals? Justify your answer,

What do you understand by the term 'non stoichiometric hydrides? Do yo

1.	What do you understand by the term 'non stoichiometric hydrides? Do you expect this type f hydrides to be formed by alkali metals? Justify your answer,
Answer» Solution :These HYDRIDE which do not have FIXED composition are called non-stoichiometric hydride and the composition varies with temperature and pressure This type of HYDRIDES are FORMED by d and f-block ELEMENTS. They cannot be formed by alkali metals because alkali metal hydrides form ionic hydrides.