Question

Match the reactions in column I with their respective products and number of electrons given in column II.

Answer 1

The complete reactions have been given below:
$2S_2{O}_3^{2-}⟶S_4{O}_6^{2-}+2e^{-}$
$S_2{O}_3^{2-}+10\stackrel{\ominus }{O}H⟶2S{O}_4^{2-}+5H_{2}O+8e^{-}$
$5H_{2}O+S_2{O}_3^{2-}⟶2HS{O}_4^{\ominus }+8H^{\oplus }+8e^{-}$
$5e^{-}+8H^{\oplus }+Mn{O}_4^{\ominus }⟶{Mn}^{2+}+4H_{2}O$
$e^{-}+Mn{O}_4^{\ominus }⟶Mn{O}_4^{2-}$
$3e^{-}+4H^{\oplus }+Mn{O}_4^{\ominus }⟶Mn{O}_2+2H_{2}O$
Therefore, the correct match is $A\to 2,B\to 3,C\to 1,D\to 5,E\to 6,F\to 4$.