Two liquids A and B form an ideal solution. At 320 K, the vapour pressure of the solution, containing 3 mol of A and 1 mol of B is 500 mm Hg. At the same temperature, if 1 mol of A is further added to this solution, vapour pressure of the solution increases by 20 mm Hg. Vapour pressure (in mm Hg ) of B in the pure state is 
. (Nearest integer)
Text Solution
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(200) 
…………… . (i)
Now 1 moles of A is further added so 
mole, 
mole
……………… .. (ii)
By equation (ii) - equation (i)
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