STANDARDChemistry-Electrochemistry
STANDARD Chemistry Nernst Equation MCQ Question
Type: MCQ-numerical-Medium-Class 12
For the cell reaction : 2Cu⁺(aq) → Cu(s) + Cu²⁺(aq), the standard cell potential is 0.36V. The equilibrium constant for the reaction is
A
1.2 × 10⁶
B
7.4 × 10¹²
C
2.4 × 10⁶
D
5.5 × 10⁸
Correct Answer
Option A
Detailed Explanation
The equilibrium constant Kₑ is calculated using the Nernst equation: log Kₑ = nE°/0.0591. For the given reaction, n = 1, so log Kₑ = 1 × 0.36 / 0.0591 = 6.09. Therefore, Kₑ = antilog 6.09 = 1.2 × 10⁶.
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