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Which of the following reactions do not involve oxidation reduction ? I. 2Cs+2H_(2)Orarr2CsOH+H_(2) II. 2CuI_(2)rarr2CuI+I_(2) III. NH_(4)Br+KOHrarrKBr+NH_(3)+H_(2)O IV. 4KCN+Fe(CN)_(2)rarrK_(4)[Fe(CN)_(6)] |
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Answer» l, II `H_2O + e^(-) rarr OVERLINE(O)H +1/2H_2`(Reduction) Hence, redox REACTION. II. `e^(-) + Cu^(2+) rarr Cu^(1+)` (Reduction) `2I^(-) rarr l_2 +2e^(-)` (Oxidation) Hence, redox reaction. II. `N overset(+)(H)_4 rarr NH_3` (No change in oxidation number) Hence, reaction is not a redox reaction. IV. No change in the oxidation number of either `Fe_(2+)` or `CN^(-)` in both reactant and PRODUCT, hence, reaction is not a redox reaction. |
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