In the reaction `2I^(-)` + `S_(2)O_(8)^(2-)` `rarr` `I_(2)` + `2SO_(4)^(2-)` the catalyst is (A) `Fe^(+3)` (B) `Mn^(+2)` (C) `Cu^(+2)` (D) `Ni^(+2)`

In the reaction 2Na_(2)S_(2)O_(3)+I_(2) rarr Na_(2)S_(4)O_(6)+2NaI , the oxidation state of S is -

In the reaction C_(2) O_(4)^(-2) + MnO_(4)^(-) + H^(+) rarr Mn^(+2) +CO_(2) the reductants is -

Statement-1: For the reaction: 2I^(-)+S_(2)O_(8)^(2-)toI_(2)+2SO_(4)^(2-),Fe(III) catalyst is used Statement-2: 2Fe^(3+)+2I^(-)to2Fe^(2+)+I_(2) 2Fe^(2+)+S_(2)O_(8)^(2-)to2Fe^(3+)+2SO_(4)^(2-)

In this reaction: S_(2)O_(8)^(2-)+2I^(-) to 2SO_(4)^(2-)+I_(2)

Consider the redox reaction 2S_(2)O_(3)^(2-)+I_(2)rarrS_(4)O_(6)^(2-)+2I^(ө)

In the reaction, IO_(3)^(-)+SO_(2)+4H_(2)O to I_(2)+SO_(4)^(2-)+8H^(+) The coefficient of SO_(2) is