Q25 / 160 · NTA Abhyas (NEET) 2020 · Chemistry · Solutions
At 35ºC, the vapour pressure of is 512 mm Hg and that of acetone is 344 mm Hg. A solution of in acetone has a total vapour pressure of 600 mm Hg. The false statement amongst the following is
- Correct answerAA mixture of 100 mL and 100 mL acetone has a volume mL
- BRoult's law is not obeyed by this system
- CHeat must be absorbed in order to produce the solution at 35ºC
- Dand acetone are less attracted to each other than to themselves
Solution
The vapour pressure of mixture (= 600 mm Hg) is greater than the individual vapour pressure of its constituents (Vapour pressure of 512 mm Hg, acetone = 344 mm Hg).
Hence, the solution formed shows positive deviation from Raoult's law.
Raoult's law is not obeyed
Volume > 0
and Acetone are less attracted to each other than to themselves.
Hence, the solution formed shows positive deviation from Raoult's law.
Raoult's law is not obeyed
Volume > 0
and Acetone are less attracted to each other than to themselves.
Hence, the correct answer is option: 'A'.