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Questions  

Which of the following represents redox reactions?

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

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By Expert Faculty of Sri Chaitanya
a
I, II
b
I, III
c
III, IV
d
II, III, IV

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detailed solution

Correct option is D

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


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