The standard reduction potentials of Pt | Cr2O7^2–, Cr3+; Pt | MnO4–, Mn2+; Pt | Ce4+, 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 oxidiz

Question

The standard reduction potentials of Pt | Cr2O7^2–, Cr3+; Pt | MnO4–, Mn2+; Pt | Ce4+, 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

Prashant Kotian · Accepted Answer

Correct answer: C. The higher the standard reduction potential, the stronger the tendency to be reduced, and thus the stronger the oxidizing agent. The order from highest potential to lowest is Ce4+ (1.61 V) > MnO4– (1.51 V) > Cr2O7^2– (1.33 V).

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