QJEEM20Ch34fa: JEE Main 2020 Chemistry - Class 12 JEEM20Ch34fa Solution: At 35 o C, the vapour pressure of CS 2 is 512 mm. Hg and that…

As the vapour pressure of mixture increases so the force of attraction of mixture is less than the individual component.

Since the vapour pressure of the solution is greater than individual vapour pressure of both pure components, the solution shows a positive deviation from Raoult’s law.

$$\therefore$$ $$\mathrm{\Delta }$$_SolH $$>$$ 0

As $$\mathrm{\Delta }$$_SolH $$>$$ 0 then solution is endothermic.

and here $$\mathrm{\Delta }$$_Sol Volume $$>$$ 0. As $$\mathrm{\Delta }$$_Sol Volume $$>$$ 0 then a mixture of 100 ml. CS₂ and 100 ml. acetone has a volume more than 200 ml. It happens because the distance between molecules increases due to force of attraction of mixture decreases.