engineering chemistry MCQ #2166

For the reaction 2NO ⇌ N2 + O2, if Kc = 0.1 and initial concentration of NO is 2 M, what is [N2] at equilibrium?

engineering chemistry MCQ #2166

  1. Question 1

    Q1. For the reaction 2NO ⇌ N2 + O2, if Kc = 0.1 and initial concentration of NO is 2 M, what is [N2] at equilibrium?

    • A) 0.33 M
    • B) 0.25 M
    • C) 0.5 M
    • D) 0.1 M

    Answer: 0.25 M

    Explanation: Kc = [N2][O2]/[NO]², assuming x M of NO reacts, 0.1 = x²/(2-2x)², solving gives x = 0.25 (approx).