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Which of the following is covalent?...

Which of the following is covalent?

A

`H_2`

B

`KCl`

C

`Na_2S`

D

`CaO`

Text Solution

Verified by Experts

The correct Answer is:
A
Hydrogen gas is a covalent substance. It is made up of `H_2` molecules, in which two H atom share an electron pair:
`H:H` or `H-H`
Rest of the substances are ionic compounds:
`K^(+)Cl^(-), (Na^(+))_2S^(2-)`, and `Ca^(2+)O^(2-)`
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