1.

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.

Answer»

(i) Bromine is a stronger oxidant than iodine.



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