Question

28. Consider the following statements: A. Colligative properties have been used to determine the molar mass of solutes. B. The components of azeotropic mixture can be separated by fractional distillation C. The process of osmosis can be reversed if a pressure higher than the osmotic pressure is applied to the solution side The incorrect statement(s) is/are:

• A. Only B
• B. A and B only
• C. A and C only
• D. A, B and C

Answer 1

Answer: (A)

Only B

Answer 2

Statement A is true because colligative properties are directly related to the number of solute particles, allowing for the determination of molar mass. Statement B is false; azeotropes are mixtures that boil at a constant temperature and have the same composition in the vapor phase as in the liquid phase, making them inseparable by simple fractional distillation. Statement C is true; applying a pressure greater than the osmotic pressure to the solution side of a semipermeable membrane forces solvent molecules back into the solvent compartment, which is the principle of reverse osmosis.