Stoichiometry
According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

The attractive forces between like and unlike molecules are almost equal
The component molecules are non polar and are of almost equal size
No component is concentrated at the surface of the solution
In the formation of solution, chemical combination/molecular association between unlike molecules takes place

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Stoichiometry
A long cylinder and a sphere both of 5 cms diameter are made from the same porous material. The flat ends of cylinder are sealed. Both the cylinder and sphere are saturated with the same solution of sodium chloride. Later both the objects are immersed for a short and equal interval of time in a large tank of water which is well agitated. The fraction of salt remaining in the cylinder and the sphere are Xc and Xs respectively. Which of the following statement is correct?

Xc greater/less than Xs depending on the length of the cylinder
Xc < Xs
Xc > Xs
Xc = Xs

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