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

Question

$\mathrm{S}_{2} \mathrm{O}_{7}^{2-}$

$\mathrm{S}_{2} \mathrm{O}_{8}^{2-}$

$\mathrm{SO}_{3}^{2-}$

$\mathrm{SO}_{4}^{2-}$

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