Thiosulphate reacts differently with iodine and bromine in the reactions given below:
Thiosulphate reacts differently with iodine and bromine in the reactions given below:
2S2O32– + I2 → S4O62– + 2I–
S2O32– + 2Br2 + 5H2O → 2SO42– + 2Br– + 10 H+
Which of the following statements justifies the above dual behaviour of thiosulphate?
(i) Bromine is a stronger oxidant than iodine.
(ii) Bromine is a weaker oxidant than iodine.
(iii) Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions.
(iv) Bromine undergoes oxidation and iodine undergoes reduction in these reactions.
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