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Chemistry Level pending

Two volatile liquids \(A\) and \(B\) are taken in two separate container \(P\) and \(Q\). 10 moles Liquid \(A\) is poured in container \(P\) and 5 moles of liquid \(B\) is poured in container \(Q\). Now in container \(P \), 5 moles of non-volatile solute (molecular formula MX2) is mixed whereas in container \(Q \), 3 moles of another non -volatile solute Y(molecular formula M2X3)h is mixed.

Now the two solutions formed in \(P\) and \(Q\) are mixed together mixed in third container. Now the total vapour pressure of mixture of \(A,B,X,Y\) is noted and reported. Find the reported Vapour pressure.


  • Vapour pressure of A and B in pure state is 180 mm Hg and 270 mm Hg respectively.

  • solutions are ideal

  • non-volatile solutes ionize completely in A and B

  • All components of solutions are non-reacting.


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