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Polarisability and Fajan's Rule

Which of the ...

Question

Which of the following hydrides are ionic?

A

C a H_{2}

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B

B a H_{2}

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C

S r H_{2}

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D

B e H_{2}

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Solution

The correct options are
A $C a H_{2}$
B $B a H_{2}$
C $S r H_{2}$
$B e H_{2}$ is covalent due to small size and high charge density of $B e (I I)$ ion whereas $C a H_{2}$ , $B a H_{2}$ and $S r H_{2}$ are ionic.

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