Chemistry · Redox Reactions

Thiosulphate reacts differently with iodine and bromine in the reactions given below: 2S2O32− + I2 → S4O62− + 2I− S2O32− + 2Br2 + 5H2O → 2SO42− + 4Br− + 10H+ Which of the following statements justifies the above dual behaviour of thiosulphate?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1Bromine is a stronger oxidant than iodine.✓
2Bromine is a weaker oxidant than iodine.
3Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions.
4Bromine undergoes oxidation and iodine undergoes reduction in these reactio ns.

Correct answer

Bromine is a stronger oxidant than iodine.

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