JEE Chemistry · Medium

Chemical and Ionic Equilibrium: Kp vs Kc MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Kp vs KcMediumQuestion 600436

Question

For the reaction CO(g) + ½O₂(g) ⇌ CO₂(g), Δn =
  1. A
    +1/2
  2. B
    −1/2
    Correct
  3. C
    +1
  4. D
    0

Correct answer

−1/2

Explanation

Δn = moles gaseous products − moles gaseous reactants = 1 − (1 + 1/2) = −1/2. So Kp = Kc(RT)^(−1/2).