AIPMT MAINS 2012 Chemistry Equilibrium Constants MCQ Question
Given the reaction between 2 gases represented by A₂ and B₂ to give the compound AB(g).
A₂(g) + B₂(g) ⇌ 2 AB(g).
At equilibrium, the concentration of A₂ = 3.0 × 10⁻³ M, B₂ = 4.2 × 10⁻³ M, and AB = 2.8 × 10⁻³ M. If the reaction takes place in a sealed vessel at 527°C, then the value of Kc will be:
2.0
1.9
0.62
4.5
Correct Answer
Detailed Explanation
The equilibrium constant Kc is calculated using the formula Kc = [AB]² / ([A₂][B₂]). Substituting the given concentrations, Kc = (2.8 × 10⁻³)² / (3.0 × 10⁻³ × 4.2 × 10⁻³) = 0.62.
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