engineering chemistry MCQ #2132

For the reaction A + B ⇌ C + D, Kc = 4. If 1 mole of A and 1 mole of B are mixed, what is the equilibrium concentration of C?

engineering chemistry MCQ #2132

  1. Question 1

    Q1. For the reaction A + B ⇌ C + D, Kc = 4. If 1 mole of A and 1 mole of B are mixed, what is the equilibrium concentration of C?

    • A) 2/3
    • B) 1/2
    • C) 2/5
    • D) 4/5

    Answer: 2/3

    Explanation: Kc = [C][D]/[A][B] = 4, let x be the concentration of C, then x²/(1-x)² = 4, x = 2/3