Easy MCQ +4 / -1 PYQ · JEE Mains 2022

In neutral or alkaline solution, $\mathrm{MnO}_{4}^{-}$ oxidises thiosulphate to :

  1. A $\mathrm{S}_{2} \mathrm{O}_{7}^{2-}$
  2. B $\mathrm{S}_{2} \mathrm{O}_{8}^{2-}$
  3. C $\mathrm{SO}_{3}^{2-}$
  4. D $\mathrm{SO}_{4}^{2-}$ Correct answer

Solution

$8 \mathrm{MnO}_{4}^{-}+3 \mathrm{~S}_{2} \mathrm{O}_{3}^{2-}+ \mathrm{H}_{2} \mathrm{O}\rightarrow 8 \mathrm{MnO}_{2}+6 \mathrm{SO}_{4}^{2-}+$ $2 \mathrm{OH}^{-}$

About this question

Subject: Chemistry · Chapter: d and f Block Elements · Topic: Properties of Transition Metals

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