In the reactions given below, thiosulphate reacts differently with iodine than with bromine.
Which of the following statements best describes the above dual behaviour of thiosulphate?
1. Bromine is a stronger oxidant than iodine
2. Bromine is a weaker oxidant than iodine
3. Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reactions
4. Bromine undergoes oxidation and iodine undergoes reduction in these reactions
|Element||Change in oxidation state||Reaction|
|S||+2 ---> 2. 5||oxidation|
|Br||0 ----> -1||reduction|
In both the reactions, halogen acts as an oxidising agent and oxidised and it self gets reduce. The change in oxidation state of sulphur in case of is more than in case of . Hence, being stronger oxidisng agent than I2,