Single Choice

The mixture which shows positive deviation from Raoult’s law is

ABenzene $$+$$ Toluene
BBenzene $$+$$ Toluene
CChloroethane $$+$$ Bromoethane
DEthanol $$+$$ Acetone
Correct Answer

Solution

In positive deviation from Raolt's Law, the resulting solution has more vapour pressure than the ideal solution of the constituent liquids.

This is because the A-B interactions are weaker than A-A & B-B ones.

Because there is hydrogen bonding present in the ethyl alcohol solution and acetone molecules tend to occupy the space between them due to which some hydrogen bonds breaks, results in weaking of $$A-B$$ interaction.

Option D is correct.

SIMILAR QUESTIONS

Solutions

If Raoult's law is obeyed, then vapour pressure of the solvent in a solution is directly proportional to:

Solutions

The weight of an empty china dish is 39 g and when a saturated solution of potassium nitrate is poured into, its weight is 108 g at $$50^{\circ}C$$. After evaporating the solution to dryness, if the weight of the dish along with the crystals is 72 g then the solubility of potassium nitrate at $$50^{\circ} C$$ is .....................

Solutions

For a dilute solution, Raoult's law states that:

Solutions

Which one of the following is incorrect for ideal solution?

Solutions

For a dilute solution, Raoult's law states that:

Solutions

Which of the following is satisfied by an ideal solution?

Solutions

What are the similarities between Raoult's Law and Henry's Law

Solutions

State the following : Raoult's law in its general form in reference to solutions .

Solutions

State Raoult's law for the solution containing volatile components. Write two differences between an ideal solution and a non-ideal solution.

Solutions

The relative lowering of the vapour pressure is equal to the ratio between the number:

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