Thiosulphate reacts differently with iodine and bromine in the reactions given below: 2…
Chemistry · JEE Main · NTA Exams — Redox Reactions and Electrochemistry
Thiosulphate reacts differently with iodine and bromine in the reactions given below:
\(2 \mathrm{~S}_{2} \mathrm{O}_{3}^{2-}+\mathrm{I}_{2} \rightarrow \mathrm{~S}_{4} \mathrm{O}_{6}^{2-}+2 \Gamma\)
\(\mathrm{S}_{2} \mathrm{O}_{3}^{2-}+5 \mathrm{Br}_{2}+5 \mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{SO}_{4}^{2-}+4 \mathrm{Br}^{-}+10 \mathrm{H}^{+}\)
Which of the following statement justifies the above dual behaviour of thiosulphate?
(Jee Main 2024)
\(2 \mathrm{~S}_{2} \mathrm{O}_{3}^{2-}+\mathrm{I}_{2} \rightarrow \mathrm{~S}_{4} \mathrm{O}_{6}^{2-}+2 \Gamma\)
\(\mathrm{S}_{2} \mathrm{O}_{3}^{2-}+5 \mathrm{Br}_{2}+5 \mathrm{H}_{2} \mathrm{O} \rightarrow 2 \mathrm{SO}_{4}^{2-}+4 \mathrm{Br}^{-}+10 \mathrm{H}^{+}\)
Which of the following statement justifies the above dual behaviour of thiosulphate?
(Jee Main 2024)
- Bromine is a stronger oxidant than iodine.
- Thiosulphate undergoes oxidation by bromine and reduction by iodine in these reaction.
- Bromine is a weaker oxidant than iodine.
- Bromine undergoes oxidation and iodine undergoes reduction in these reactions.
Answer
(A) Bromine is a stronger oxidant than iodine.
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