Q. Which of the following is a characteristic of an ideal solution?
✅ Correct Answer: (C)
Raoult's law is obeyed for all components
Explanation: Ideal solutions obey Raoult's law across the composition range; there is no net enthalpy change on mixing (ΔHmix = 0) and no volume change on mixing (ΔVmix = 0). Therefore options 1 and 2 are characteristics of non-ideal solutions, and option 4 is false for ideal solutions because chemical reaction on mixing would make it non-ideal. Option 3 is the correct trait.
Explanation by: Sikhar Chaudhary
Ideal solutions obey Raoult's law across the composition range; there is no net enthalpy change on mixing (ΔHmix = 0) and no volume change on mixing (ΔVmix = 0). Therefore options 1 and 2 are characteristics of non-ideal solutions, and option 4 is false for ideal solutions because chemical reaction on mixing would make it non-ideal. Option 3 is the correct trait.