Question

Which of the following statements about colloids is False?

• A. Freezing point of colloidal solution is lower than true solution at same concentration of a solute.
• B. Colloidal particles can pass through ordinary filter paper.
• C. When silver nitrate solution is added to potassium iodide solution, a negatively charged colloidal solution is formed.
• D. When excess of electrolyte is added to colloidal solution, colloidal particle will be precipitated.

Answer 1

Answer: (A)

Freezing point of colloidal solution is lower than true solution at same concentration of a solute.

Answer 2

Freezing point is a colligative property. The colligative properties are properties that depend only on the number of solute particles in a solution, but are independent of the nature of those particles. Therefore, freezing point of colloidal solution will be same as that of true solution at same concentration of a solute.

So, the correct option is (A): Freezing point of colloidal solution is lower than true solution at same concentration of a solute.