Chemistry · The vapour pressure of solutions and Raoult's Law - Ideal and non-ideal solutions, vapour pressure composition, plots for ideal and non-ideal solutions
The vapour pressure is least for?
The vapour pressure is least for?
- A. pure water
- B. \( 0.1 \mathrm{m} \) aqueous urea
- C. \( 0.2 \mathrm{m} \) aqueous urea
- D. 0.3m aqueous urea
Step-by-step solution
Vapour pressure lowering is a colligative property, which depends on the number of solute particles. For a non-volatile solute like urea, increasing the molality increases the number of solute particles, thereby decreasing the vapour pressure of the solution. Hence, the solution with the highest molality (0.3 m) has the least vapour pressure.
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