At 35 ""^(@)C the vapour pressure of CS_(2) is 512 mm of Hg and that of acetone is 344 mm of Hg. A solution of CS_(2) in acetone has a total vapour pressure of 600 mm of Hg. The false statement among the following is :

At 35 ""^(@)C the vapour pressure of CS_(2) is 512 mm of Hg and that o

1.	At 35 ""^(@)C the vapour pressure of CS_(2) is 512 mm of Hg and that of acetone is 344 mm of Hg. A solution of CS_(2) in acetone has a total vapour pressure of 600 mm of Hg. The false statement among the following is :
Answer» `CS_(2)` and acetone are less attracted to each other than themselves. Heat must be absorbed in order to PRODUCE the SOLUTION at `35^(@)C`. RAOULT's LAW is not obeyed by this system A mixture of 100 mL `CS_(2)` and 100 mL acetone has a volume less than 200 mL. Solution :`p_("total")=p_(A)^(@)x_(A)+p_(B)^(@)x_(B)` Maximum value of `X_(A)` is 1, so `p_("total")` has maximum value of 512 mm, which is less value than observed 600 mm value, so positive deviation would be observed. In which interaction between A-A and B-B is more than A-B interaction. So, for the system which does not follow Raoult.s law and shows positive deviation, `Delta V_(mix)gt 0, Delta H_(mix)gt 0`