A) \[C{{r}^{2}}{{O}_{7}}^{2-}+{{H}^{+}}+{{I}^{-}}\to 2C{{r}^{3+}}+{{I}_{2}},\] \[{{I}_{2}}+{{S}_{2}}{{O}_{3}}^{2-}\to {{S}_{4}}{{O}_{6}}^{2-}+{{I}^{-}}\]
B) \[Mn{{O}_{4}}^{-}+{{H}^{+}}+{{I}^{-}}\to Mn{{O}_{2}}+{{I}_{2}}\] \[{{I}_{2}}+{{S}_{2}}{{O}_{3}}^{2-}\to {{S}_{4}}{{O}_{6}}^{2-}+{{I}^{-}}\]
C) \[Mn{{O}_{4}}^{-}+O{{H}^{-}}+{{I}^{-}}\to Mn{{O}_{2}}+{{I}_{2}}\] \[{{I}_{2}}+{{S}_{2}}{{O}_{3}}^{2-}\to {{S}_{4}}O_{6}^{2-}+{{I}^{-}}\]
D) \[C{{r}_{2}}{{O}_{7}}^{2-}+O{{H}^{-}}+{{I}^{-}}\to 2C{{r}^{3+}}+{{I}_{2}}\] \[{{I}_{2}}+{{S}_{2}}{{O}_{3}}^{2-}\to {{S}_{4}}O_{6}^{2-}+{{I}^{-}}\]
Correct Answer: B
Solution :
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