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Binary Compounds - Hydrides

Correct order...

Question

Correct order of ionic character is:

A

C a H_{2} < B a H_{2} < C H_{4}

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B

C H_{4} < C a H_{2} < B a H_{2}

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C

C H_{4} < B a H_{2} < C a H_{2}

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D

B a H_{2} < C a H_{2} < C H_{4}

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Solution

The correct option is B $C H_{4} < C a H_{2} < B a H_{2}$
$B e H_{2} < C a H_{2} < B a H_{2}$

Smaller the size of cation more will be its polarising power. Hence, $B e H_{2}$ will be the least iconic.
"or"
On moving down the group metallic character of metals increases so the ionic character of metal hydride increases.

Hence option B is correct.

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