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RE-NEET2026Chemistry-Electrochemistry

RE-NEET 2026 Chemistry Standard Electrode Potentials MCQ Question

Type: MCQ-numerical-Medium-Class 12

The standard electrode potential (E°) for the half-cell reaction Fe³⁺ + e⁻ → Fe²⁺ at 298 K is

(Given: E°(Fe³⁺/Fe) = -0.04 V and E°(Fe²⁺/Fe) = -0.44 V at 298 K)

A

+0.76 V

B

-0.48 V

C

+0.92 V

D

+0.40 V

Correct Answer

Option A

Detailed Explanation

The standard electrode potential for the reaction Fe³⁺ + e⁻ → Fe²⁺ is calculated using the formula E° = E°(Fe²⁺/Fe) - E°(Fe³⁺/Fe) = -0.44 V - (-0.04 V) = +0.76 V.

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