Question

Consider the following statements:

I. Osmotic pressure is the external pressure that must be applied to a pure solvent to prevent osmosis.
II. Osmotic pressure is proportional to the molarity.
III. Osmotic pressure is a colligative property.

Choose the correct statements.

• A. I & III only
  
• B. II & III only
  
• C. I & II only
  
• D. I, II and III

Answer 1

The correct option is D I, II and III

Osmotic pressure is the pressure that has to be applied to a pure solvent to prevent it from passing into a given solution by osmosis. It is often used to express the concentration of the solution. Colligative properties depend on the number and hence, the concentration of solute molecules.
Hence, all the three statements are correct.