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Valency and Oxidation State

When a sulphu...

Question

When a sulphur atom becomes a sulphide ion

A

There is no change in the composition of atom

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B

It gains two electrons

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C

The mass number changes

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D

None of these

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Solution

The correct option is B It gains two electrons
$S + 2 e^{-} \to S^{2 -}$

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