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Valency and Oxidation State

When Cl- is...

Question

When ${C l}^{-}$ is converted into ${C l}_{2}$ , change in oxidation number is :

3

units

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1

units

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2

units

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none of these

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Solution

The correct option is C $1$ units
The reaction is ${C l}^{-} - 1 ⟶ \frac{1}{2} {C l}_{2} 0$
Change in oxidation number $= 1$ unit.

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