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We know that metal oxides are basic and non metal oxides are acidic. What nature does metal hydrides and non metal hydrides show?

We know that metal oxides are basic and non metal oxides are acidic. What nature does metal hydrides and non metal hydrides show?

Grade:12

3 Answers

Aarti Gupta
askIITians Faculty 300 Points
9 years ago
Hydrides are those compounds which are formed between hydrogen and other elements.Depending on what elements the hydrogen bonds to,these are of following types-
1.Ionic hydrides – These are also known as saline hydrides or pseudohalides and are formed between hydrogen and the more electropositive active metals, especially with the alkali and alkaline-earth metals of group I and group II. In these compounds, the hydrogen acts as the hydride ion (H-).
2.Covalent hydrides – These hydrides constitute the major group and are formed between a hydrogen atom and one or more non-metals. This occurs when hydrogen covalently bonds to a more electropositive element by sharing electron pairs. These hydrides can be volatile or non-volatile.For ex- HCl.The hydrides of nonmetals on the periodic table become more electronegative as we move from group 13 to 17. This means that they are less capable of donating an electron, and want to keep them because their electron orbital becomes fuller. Instead of donating a H-, they would instead donate a H+ because they are more acidic.
3.Interstitial hydrides – Such hydrides are the characteristics of transition metals.Also known as metallic hydrides.They are non-stoichiometric which means the fraction of hydrogen atoms to the metals are not fixed.

Shibashis Mallik
21 Points
9 years ago
This means that ionic and interstitial hydrides are basic and covalent hydrides are acidic. Isn’t it?
Aarti Gupta
askIITians Faculty 300 Points
9 years ago
Yes ionic hydrides are basic so act as reducing agent in metallurgical proces.These are also known as saline hydrides as their properties are is similar to salt and covalent ones are acidic.However the trends may get change -
1).Hydrides of III-A and IV-A are neutral.
2) Hydrides of V-A are basic.
3) Hydrides of VI-A and VII-A are acidic.

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