Question

The osmotic pressure is due to
a) Solute
b) Semi-permeable membrane
c)Hypertonic solution
d)Water

Answer 1

Hint: The osmotic pressure is the pressure which is applied by the solution to prevent the inward motion of the pure solvent from the semi-permeable membrane or we can say that it is a tendency of the liquid to take in a pure solvent across the semipermeable membrane by the process of osmosis.

Complete answer:
 The osmotic pressure is the pressure which is applied by the solution to prevent the inward motion of the pure solvent from the semi-permeable membrane. This pressure is due to the dissolved solutes present in the solution. Osmosis leads to accumulation of the water into the cell by the osmotic pressure. The osmotic pressure develops in a confined system. The value of the osmotic pressure is always positive. It is equal to osmotic potential but numerically osmotic potential is negative. Too much movement of water can also cause some problems. The cell may become dehydrated if excess water is moved out of the cell and the cell may burst if too much water moves inside the cell. the plants use this osmotic pressure to their advantage. The plants move water and other solutes from one part of the plant to the other by the process of osmosis.
So, the correct answer is ‘solutes.

Note: The presence of solutes is important in carrying out the water from one cell to the other. This helps in the movement of water in the plants. The osmotic pressure is applied by the solution to prevent the inward motion of the pure solvent from the semi-permeable membrane. This pressure is due to the dissolved solutes present in the solution.