JEE Main 2024 Chemistry question
Thiosulphate reacts differently with iodine and bromine in the reaction given below: 2S₂O₃²⁻ + I₂ → S₄O₆²⁻ + 2I⁻ and S₂O₃²⁻ + 5Br₂ + 5H₂O → 2SO₄²⁻ + 4Br⁻ + 10H⁺. Which of the following statement justifies the above dual behaviour of thiosulphate?
Answer: (C)
Solution
Bromine, the stronger oxidant, takes thiosulphate all the way to sulphate, whereas iodine only oxidises it to tetrathionate.