Question

Match the half-reactions (in List I) with change in oxidation number (in List II).

Answer 1

(A) The change in the oxidation state of Cl in ${Cl}^{-}⟶Cl{O}_4^{-}$ is +8.
(B) The change in the oxidation state of Cr in ${Cr}^{3+}⟶Cr{O}_5$ is +3.
(C) The change in the oxidation state of O in $H_2{O}_2⟶O_2$ is +2
(D) The change in the oxidation state of Cr in $Cr{O}_2^{2+}⟶Cr{O}_4^{2-}$ is +3.