First slide
Chemical equations and calculations
Question

Which of the following represents redox reactions?

I. Cr2O72+2OH-2CrO42+H2OII. Zn+CuSO4ZnSO4+CuIII. 2MnO4+3Mn2++4OH-5MnO2+2H2OIV. 2CuCu+Cu2+

Moderate
Solution

II, III and IV are redox reactions , and involves  change in oxidation states

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