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Which of the following compounds is cova...

Which of the following compounds is covalent?

A

`H_(2)`

B

`CaO`

C

KCl

D

None of these

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Verified by Experts

The correct Answer is:
A
Among CaO, KCl and `H_(2).H_(2)` is a covalent compound , rest being ionic ferric oxide `Fe_(2)O_(3).xH_(2)O` involves formation of a bond between `Fe^(3+) and O^(-2)` ions.
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