Question

Which of the following would exert maximum osmotic pressure ?

• A. Decinormal aluminium sulphate
• B. Decinormal barium chloride
• C. Decinormal sodium chloride
• D. A solution obtained by mixing equal volumes of (b) and (c) and filtering

Answer 1

The correct option is A Decinormal aluminium sulphate

Osmotic pressure is a colligative property which depends upon the number of particles of solute. Thus, the solution in which solute gives the maximum number of ions exerts maximum osmotic pressure.

The number of particles in Decinormal aluminum sulphate is 5.

The number of particles in Decinormal barium chloride is 3.

The number of particles in Decinormal sodium chloride is 2.

When the equal volume of (b) and (c) are mixed, the concentration becomes half of the present concentration. Therefore decinormal aluminum suphate exerts maximum osmotic pressure. Hence option A is the correct answer.