Question

The osmotic pressure of distilled water will be –
A. Minimum
B. Maximum
C. Higher than any solution
D. Variable

Answer 1

Hint:
1. osmotic pressure is the pressure that is applied on a pure solvent so that it will not pass into a given solution by the process of osmosis.
 2. It is used to express concentration of the solution.

Complete step-by-step answer:
1. In other words we can say that the osmotic pressure is the minimum pressure which is applied to a solution to avoid the inward flow of it’s pure solvent across a semipermeable membrane.
2 :- here , osmotic pressure π = iMRT
                     i= van't hoff's factor
                     R= Noble gas constant
                     T= Temperature
                     M= Molar concentration of solution ( mol per litre)
3 :- From the above equation we come to know that the osmotic pressure of any liquid is directly proportional to the molar concentration as all three factors like temperature, noble gas constant and van't hoff factor are constant.
4:- And the molar concentration of solution depends on the amount of solute dissolved in the solvent. More the amount of solute dissolves in the solvent the more the solution will be concentrated higher will be the mole concentration and higher will be the osmotic pressure.
5 :- we can directly say that the osmotic pressure of any solution is directly proportional to the amount of solute dissolve in the solvent to make it a solution.
6 :- In distilled water, we all know that the amount of solute is least, in fact no solute is dissolved in the distilled water. So the molar concentration of distilled water is zero and if molar concentration is zero then osmotic pressure will also be zero.
Hence the osmotic pressure of distilled water is MINIMUM.

So, the correct answer is “Option A. Minimum”.

Note: Osmotic pressure increases with the amount of solute dissolve.