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Question:

In which pair of ions do both species contain an S-S bond?

S4O2⁻²,S2O2⁻²

S2O2⁻²,S2O2⁻²

S2O2⁻²,S2O2⁻²

S4O2⁻²,S2O2⁻²

Solution:

S₄O₆⁻² and S₂O₆⁻² both species contain an S-S bond. Hence, option C is correct.