Which substance cannot be reduced by H2O2
Fe+2 salts are converted to ferric salts by action of hydrogen peroxide where H2O2 acts as an oxidising agent.
2Fe2+ -->2Fe3+ +2e-
H2O2 +2H+ +2H− -->2H2O
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2Fe2+ + H2O2 + 2H+ --> 2Fe3+ + 2H2O