Assertion (A): Sulphide ion is $S^{- 2}$ .
Reason (R): Sulphur gains two electrons.

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Assertion is True, Reason is True but Reason is not correct explanation of Assertion

Assertion is True, Reason is False

Assertion is True, Reason is True and Reason is correct explanation of Assertion

Assertion is False, Reason is True

answer is A.

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Detailed Solution

To attain octet configuration, sulphur should gain 2 electrons.

Ex: $H_{2} S$

Here, sulphur has more electronegative than hydrogen. Hence, sulpur forms $S^{- 2}$ ion by gaining two electrons from two hydrogen atoms.

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