Exams › NEET › Chemistry

Which of the following will show a negative deviation from Raoult's law?

1. Acetone-benzene
2. Acetone-ethanol
3. Benzene-methanol
4. Acetone-chloroform

Correct answer: Benzene-methanol

Solution

Benzene and methanol interact more strongly than either pure component does with itself, so the solution’s escaping tendency drops below Raoult’s-law prediction. That produces a lower vapor pressure and a negative deviation.

Related NEET Chemistry questions

• At \( 80^{\circ} \mathrm{C}, \) the vapour pressure of pure liquid \( A \) is 520 mmHg and that of pure liquid \( B \) is 1000 mmHg. If a mixture solution of \( A \) and \( B \) boils at \( 80^{\circ} \) and 1 atm pressure, the amount of \( A \) (mole percent) in the mixture is:
• A solution is prepared by adding 2 g of substance \( A \) to 18 g of water. The mass percent of the solute is:
• Which of the following solutions shows positive deviation from Raoult's law?
• Which of the following forms an ideal solution? This question has multiple correct options
• An aqueous solution of methanol in water has vapour pressure:
• At constant temperature, the osmotic pressure of a solution is: This question has multiple correct options

⚔️ Practice NEET Chemistry free + battle 1v1 →