What do you meant by the term hydride? Discuss its different types.

1.	What do you meant by the term hydride? Discuss its different types.
Answer» Hydrides: Dihydrogen combines with almost all elements except noble gases to form binary compounds under certain conditions. e. g. MgH₂, B₂H₆ etc. Types of hydrides: The hydrides are classified into three categories- (i) Ionic Hydrides: These are stoichiometric compounds of dihydrogen formed with most of the s-block elements which are highly electropositive in nature. These are also called saline hydrides. e. g NaH, CaH₂ etc (ii) Covalent Hydrides: These are stoichiometric compounds of dihydrogen formed with most of the p-block elements which have low electropositivity. These are also called molecular hydrides. eg. CH₄, NH₃,H₂O,HF, etc (iii) Metallic Hydrides: These are non-stoichiometric compounds of dihydrogen formed with d-block and f-block elements. However, the metals of group 7, 8 and 9 do not form hydride. e. g LaH_2.55, ZrH_1.3−1.75 etc

Answer»

Hydrides: Dihydrogen combines with almost all elements except noble gases to form binary compounds under certain conditions.

e. g. MgH₂, B₂H₆ etc.

Types of hydrides:

The hydrides are classified into three categories-

(i) Ionic Hydrides:

These are stoichiometric compounds of dihydrogen formed with most of the s-block elements which are highly electropositive in nature. These are also called saline hydrides. e. g NaH, CaH₂ etc

(ii) Covalent Hydrides:

These are stoichiometric compounds of dihydrogen formed with most of the p-block elements which have low electropositivity. These are also called molecular hydrides.

eg. CH₄, NH₃,H₂O,HF, etc

(iii) Metallic Hydrides:

These are non-stoichiometric compounds of dihydrogen formed with d-block and f-block elements. However, the metals of group 7, 8 and 9 do not form hydride.

e. g LaH_2.55, ZrH_1.3−1.75 etc

What do you meant by the term hydride? Discuss its different types.

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