ElectrochemistryHard

Question

The standard reduction potentials of Pt|Cr2O72−, Cr+3; Pt|MnO4−, Mn+2; Pt|Ce+4, Ce+3 in the presence of acid are 1.33 V, 1.51 V and 1.61 V, respectively, at 25°C. The decreasing order of oxidizing power is

Options

A.Cr2O72− > MnO4− > Ce+4
B.MnO4− > Cr2O72− > Ce+4
C.Ce+4 > MnO4− > Cr2O72−
D.MnO4− > Ce+4 > Cr2O72−

Solution

Higher reduction potential, stronger is the oxidizing agent.

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