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Question
What is meant by 'disproportionation'? Give two examples of disproportionation reaction in aqueous solution.
Solution
The oxidation and reduction of a substance at the same time as a result of a chemical reaction is called disproportionation. For example,
\[\ce{3\overset{0}{Cl2} + 6OH^- -> 5\overset{-1}{Cl}^- + \overset{+5}{Cl}O^-_3 + 3H2O}\]
\[\ce{3\overset{+6}{Mn}O^{2-}_4 + 4H^+ -> 2\overset{+7}{Mn}O^-_4 + \overset{+4}{Mn}O2 + 2H2O}\]
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