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What will be the equilibrium constant of reaction, 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.

Options

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

Correct answer

D. 4

Step-by-step solution

at   t   =   0 at   t   =   t     A + B → C + D n n 0 0 x x 2x 2x K c = [ C ] [ D ] [ A ] [ B ] = 2 x . 2 x x . x = 4

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