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  3. Chemistry
  4. In neutral or faintly alkaline solution, 8 moles of permanganate anion quantitatively oxidize thiosulphate anions to produce X moles of a sulphur containing product. The magnitude of X is

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Q. In neutral or faintly alkaline solution, $8$ moles of permanganate anion quantitatively oxidize thiosulphate anions to produce $X$ moles of a sulphur containing product. The magnitude of $X$ is

JEE AdvancedJEE Advanced 2016

Solution:

$3e^- + MnO_4^- + 2H_2O \to MnO_2 + 4OH^-] \times 8$
$S_2O_3^{2-} + 10OH^- \to 2SO_4^{2-} + 5H_2O + 8e^-]\times 3$
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8 moles of $MnO _{4}^{-}$ion gives 6 moles of $SO _{4}^{2-}$ ion