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Question

The nature of lithium hydride is

A
ionic
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B
covalent
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C
partially ionic
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Solution

The correct option is C partially ionic
Lithium hydride is not completely ionic as the 2s orbital of
Li and 1s orbital of H forms bond which have significant covalent characters. Also lithium hydride is unreactive at room temperature while other hydrides of group 1 elements are reactive and in molten state also its conductivity does not increase.

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