Question

A semipermeable membrane allows the diffusion of
A. Solutes
B. Solvent
C. Both solvent and solute
D. None of above

Answer 1

Hint: Diffusions usually happens with the solutions, where solutions are the one which is the mixture of two substance, and it contains one liquid portion and solid substance dissolved in it, where the liquid portion is called as solvent, and the solid substance dissolved in liquid is called as solute..

Complete answer:
Among the solutions, molecules are not present constantly, they are dynamic and they always move along the concentration gradient.
If the solvent moves without expenditure of any energy is called as passive movement, and if it is moved with the expenditure of energy then it is called as active movement.
Diffusion is the process which takes place in substances such as liquids, gases from higher concentration to lower concentration through a semipermeable membrane. Where semi permeable means this does not allow the movement of solutes, where it allows the movement of solvent only.
Osmosis is the process of diffusion where we see in the living cells, and the plasma membrane acts as a semi permeable membrane.
In the living cells, the cytoplasm of the cell is divided from the external environment by the presence of bio membrane. If the movement of solvent out of the cell happens it results in shrinkage, if the solvent occurs into the cells then expansion takes place.
So, the correct answer is “Option B”.

Note: There are three types of solution are present that are hypertonic, which means solute concentration is more than solvent, hypotonic means solvent concentration is more than solute, and isotonic means both the solute and the solvent present in same concentration.