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Liquid A and B form an ideal solution. The vapour pressure of pure liquids A and B are 350 and 750 mm Hg respectively at the same temperature. If x _ A and x_B are the mole fraction of A and B in solution while y_A and y_B are the mole fraction of A and B in vapour phase then :

Options

  1. Ax _ A x _ B y _ A y _ B
  2. Bx _ A x _ B = y _ A y _ B
  3. Cx _ A x _ B y _ A y _ B
  4. D( x _ A - y _ A ) ( x _ B - y _ B )

Correct answer

C. x _ A x _ B y _ A y _ B

Step-by-step solution

aligned & P _ A ^ o P _ B ^ o & P _ A ^o P _ B ^o 1 & y _ A y _ B = P _ A ^o P _ B ^o x _ A x _ B & y _ A y _ B & x _ A x _ B aligned

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