Exams › NEET › Chemistry

Which one is not equal to zero for an ideal solution:

1. ΔS_mix
2. ΔH_mix
3. ΔV_mix
4. ΔP = P_observed - P_Raoult

Correct answer: ΔS_mix

Solution

For an ideal solution, ΔS_mix is not zero because mixing always increases entropy. However, ΔH_mix, ΔV_mix, and ΔP are zero as there are no enthalpy or volume changes, and Raoult's law is strictly followed.

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
• Which of the following will show a negative deviation from Raoult's law?
• An aqueous solution of methanol in water has vapour pressure:

⚔️ Practice NEET Chemistry free + battle 1v1 →