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For the equilibrium reaction 2 NO(g) + O2(g) ⇌ 2 NO2(g), which of the following expressions correctly represents Kp?

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MCQ

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practice

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Topic

Equilibrium constant Kp for homogeneous systems (A-level only)

Exam-style question

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For the equilibrium reaction 2 NO(g) + O2(g) ⇌ 2 NO2(g), which of the following expressions correctly represents Kp?.

  1. A.Kp = (P_NO2)^2 / (P_NO)^2 (P_O2)
  2. B.Kp = (P_NO)^2 (P_O2) / (P_NO2)^2
  3. C.Kp = (P_NO2)^2 / (P_NO)^2
  4. D.Kp = (P_NO2)^2 / (P_O2)

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