NCERT Exercise 7.18 - Redox Reactions
Question: Balance the listed redox equations by the ion-electron method.
Answer: (a) 2MnO4- + I- + H2O -> 2MnO2 + IO3- + 2OH-. (b) 2MnO4- + 5SO2 + 2H2O -> 2Mn2+ + 5SO4^2- + 4H+. (c) H2O2 + 2Fe2+ + 2H+ -> 2Fe3+ + 2H2O. (d) Cr2O7^2- + 3SO2 + 2H+ -> 2Cr3+ + 3SO4^2- + H2O.
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