Question

In neutral or faintly alkaline medium, thiosulphate is quantitatively oxidized by $KMnO_4$ to

• A. $SO_3^{2-}$
• B. $SO^{2-}_4$
• C. $SO_2$
• D. $SO_5^{2-}$

Answer 1

Answer: (B)

$SO^{2-}_4$

Answer 2

In neutral or alkaline mediunt, thiosuphate is quantitavely oxidized by $KMnO _{4}$ to $SO _{4}^{2-}$
$8 MnO _{4}^{-}+3 S _{2} O _{3}^{2-}+ H _{2} O \to 8 MnO _{2}+6 SO _{4}^{2-}+2 OH ^{-}$