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Covalent Bond

Which of the ...

Question

Which of the following does not contain covalent bond?

C o C l_{2}

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M n O_{4}^{-}

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C r O_{4}^{2 -}

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{C r}_{2} O_{7}^{2 -}

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Solution

The correct option is A $C o C l_{2}$
In $C o C l_{2}$ , cobalt is metal and chlorine is non-metal.
A metal binds with non-metal only through ionic bonds and is not covalent as it has non-metal non-metal bonding.
So $C o C l_{2}$ is an ionic compound and doesn't have covalent bonds.
Hence, option A is correct.

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