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JEE Main levelSingle correct optionDifficulty 2 of 3bn192

The ion $S X_{2} O X_{8} X^{2 -}$ contains one O-O (peroxo) link. Its IUPAC name is

Aperoxodisulfate
Bdisulfate
Cdithionate
Dthiosulfate

Answer: A

Replacing one O of disulfate (

S X_{2} O X_{7} X^{2 -}

) by a peroxo group gives

S X_{2} O X_{8} X^{2 -}

, peroxodisulfate (persulfate). S is +6 here.

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