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For A + B ⇌ C + D , if initially the concentration of A and B are equal but at equilibrium concentration of D will be twice of that of A then what will be the equilibrium constant of C + D ⇌ A + B reaction ?

Options

  1. A9 4
  2. B9 7
  3. C1 4
  4. D4

Correct answer

C. 1 4

Step-by-step solution

x = 2 a − x 3 x = 2 a x = 2 a 3 K c x ⋅ x a – x a – x = 4 a 2 9 × a 3 × a 3 = 4 C + D ⇌ A + B; K c = 1 4

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