Question

The correct property of colloidal solutions when compared to that of true solutions is:

• A. Lower osmotic pressure
• B. High depression in freezing point
• C. High elevation in boiling point
• D. High Vapour pressure

Hint:

Colligative properties depend on particle number; colloids have fewer particles than true solutions, so osmotic pressure is lower.

Answer 1

The Correct Option is A

Step 1: Contrasting colloidal and true solutions.
Colloidal dispersions contain much larger solute entities, resulting in far fewer particles per unit volume than true solutions.

Step 2: Impact on colligative properties.
Osmotic pressure depends on particle count; colloids exhibit lower osmotic pressure due to reduced particle number.

Step 3: Conclusion.
The distinguishing feature is lower osmotic pressure.