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Benzene and toluene form nearly ideal solutions. At 20^ C , the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20^ C for a solution containing 78 ~g of benzene and 46 ~g of toluene in torr is

Options

  1. A50
  2. B25
  3. C37.5
  4. D53.5

Correct answer

A. 50

Step-by-step solution

P _ B = P _ B ^ B =75 1 1.5 =50 torr

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