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NTA Abhyas NEET2020ChemistryChemical EquilibriumPractice

A + B = C + D . If initially the concentration of A a n d B are both equal but at equilibrium, concentration of D will be twice of that of A , then what will be the equilibrium constant of reaction?

Options

  1. A4 9
  2. B9 4
  3. C1 9
  4. D4

Correct answer

D. 4

Step-by-step solution

Let the initial concentration be 'a' A + B → C + D Initial a a 0 0 at equilibrium a - x a - x x x given x = 2 a − x = 2 a − 2 x 3x = 2a x = 2 3 a at eq. ⇒ a 3 a 3 2 a 3 2 a 3 K eq = C D A B = 2 a 3 2a 3 a 3 a 3 = 4

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