Question

Isotonic solutions are solutions having the same?
(A) Surface tension
(B) Vapour pressure
(C) Osmotic pressure
(D) Viscosity

Answer 1

You should know that it is the pressure developed by the diffusion of a liquid or solvent through a membrane. Let me give you a better idea, basically it is the pressure which needs to be applied to a solution to prevent inward flow of water. Now try to figure out the solution by yourself.

Complete step by step answer:
Generally, isotonic solutions are those solutions which contain equal concentrations of impermeable solutes on either side of the membrane, due to which the cell either swells or shrinks. In simple words a solution having the same osmotic pressure or same concentration as that of another then the two are called isotonic solutions, or if a solution has the same concentration of salts as that of blood or cell it is called isotonic.

I guess by now, you are already familiar with the answer.
Osmosis is generally an interesting phenomenon, so let’s understand this concept better!
Generally, Osmotic pressure is the pressure created in an aqueous solution by a region of lower solute concentration upon a region of higher solute concentration forcing the passage of water from that to this more concentrated region.
The intensity of the osmotic pressure is equal to the pressure that is required to apply in the solution to prevent its dilution by the entering of water by osmosis.
For example, in plant cells the rigid cell wall makes opposite pressure against the tendency of water to enter when the cell is put under a hypotonic environment.

Therefore, isotonic solutions are solutions having the same osmotic pressure. Hence, option C is the required answer.

Note: You should know that this process is generally used in industrial applications, to remove dissolved and colloidal solids by pushing the fluid through the membrane.