Chemistry - Liquid Solution Question with Solution | TestHub
Identify the correct statement from following properties.
Options:
Answer:
Solution:
Osmosis is a process, whereas osmotic pressure is a colligative property. Thus, the first statement is incorrect.
When a nonvolatile solute is added to a pure solvent, the surface area available for the escape of solvent molecules decreases, which lowers the vapour pressure of the solution compared to the pure solvent at any given temperature. Thus, the second statement is correct.
NaCl is an electrolyte and dissociates into two ions (), while sucrose is a nonelectrolyte (). Therefore, the osmotic pressure of M NaCl is higher than that of M sucrose. Thus, the third statement is incorrect.
The addition of a nonvolatile solute lowers the vapour pressure, which means a higher temperature is required to make the vapour pressure equal to the atmospheric pressure. Hence, the boiling point of the solution is higher than that of the pure solvent (boiling point elevation). Thus, the fourth statement is incorrect.
Answer: The vapour pressure of solution containing nonvolatile solute is lower than that of pure solvent at any given temperature.
