RE-NEET 2026 Chemistry Standard Electrode Potentials MCQ Question
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)
+0.76 V
-0.48 V
+0.92 V
+0.40 V
Correct Answer
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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