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Question

Which of the following group IA metal(s) form complex hydrides?

A

Na

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B

K

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C

Cs

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D

Li

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Solution

The correct options are
A

Na


D

Li


Li and Sodium form complex metal hydrides like LiAlH4 and NaBH4 respectively

Hence options:

a) and d)

Other metals from the same group have smaller charge densities and hence do not form complex hydrides


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