Which of the following statements are not correct? A. For water, magnitude of K_b is more than the magnitude of K_f . B. The elevation in boiling point of water when a non-volatile solute is added to it is larger in magnitude than its depression in freezing point. C. Osmotic pressure measurement is preferred over any other colligative property to determine molar mass of proteins and polymers. D. The dimerised form of

Step-by-step solution

For water, the molal elevation constant K_b = 0.52 K kg mol ⁻¹ and the molal depression constant K_f = 1.86 K kg mol ⁻¹ . Thus, K_b For a solution with a given molality m of a non-volatile solute, the elevation in boiling point is T_b = K_b m and the depression in freezing point is T_f = K_f m . Since K_b Osmotic pressure measurement is preferred for determining the molar mass of macromolecules such as proteins and polymers because the measurement is done at room temperature and the magnitude of osmotic pressure is