At 27°C, the vapour pressure of an ideal solution containing 1 mole of A and 1 mole of B is 500 mm of Hg

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Q 1270591416.     At 27°C, the vapour pressure of an ideal solution containing 1 mole of A and 1 mole of B is 500 mm of Hg. At the same temperature, if 2 mole of B is added to this solution, the vapor pressure of solution increases by 50 mm of Hg. Find the vapour pressure of A and B respectively in their pure states.
A

200 mm, 800 mm

B

300 mm, 700 mm

C

400 mm, 600 mm

D

600 mm, 400 mm`

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