Following are a few definitions of osmosis. Read carefully and select the correct definition.
Movement of water molecules from a region of higher concentration to
a region of lower concentration through a semipermeable membrane
Movement of solvent molecules from its higher concentration to lower
concentration
Movement of solvent molecules from higher concentration to lower
concentration of solution through a permeable membrane
Movement of solute molecules from lower concentration to higher
concentration of solution through a semipermeable membrane
Following are a few definitions of osmosis. Read carefully and select the correct definition.
Movement of water molecules from a region of higher concentration to
a region of lower concentration through a semipermeable membraneMovement of solvent molecules from its higher concentration to lower
concentrationMovement of solvent molecules from higher concentration to lower
concentration of solution through a permeable membraneMovement of solute molecules from lower concentration to higher
concentration of solution through a semipermeable membrane
The correct option is A Movement of water molecules from a region of higher concentration to
a region of lower concentration through a semipermeable membrane
The correct option is A
An explanation for the correct option:
- The semi-permeable membrane allows only the solvent molecules to pass through it and not the solute particles.
Example: egg membrane, parchment membrane. - Osmosis is a special type of diffusion in which water/solvent molecules move from a region of higher concentration to a region of lower concentration through a semipermeable membrane.
- It occurs when there is a difference in solvent concentration on both sides of a semipermeable membrane.
- It tends to equalize the concentrations on the two sides and maintain equilibrium.
- If the medium is hypotonic relative to the cell cytoplasm, the cell will gain water through osmosis and swells up.
- If the medium is isotonic, there will be no net movement of water across the cell membrane because equilibrium is already present
- If the medium is hypertonic relative to the cell cytoplasm, the cell will lose water by osmosis and shrink.
- This occurs in the roots of plants to transfer water from the soil.
- Osmotic pressure is more if the concentration difference is more on both sides.
- Osmotic pressure is the minimum pressure applied on the more concentrated side to prevent the entry of solvent.
- Due to osmotic pressure, we can purify water by reverse osmosis.
Explanations for the incorrect option:
Option B
- It is called diffusion.
- Diffusion means the movement of particles ( solute or solvents) from the region of their higher concentration to the region of their lower concentration.
- Diffusion depends on the size and shape of the particle need to be diffuse
- Diffusion can be of ant particle not necessarily water/ solvent.
- It is a spontaneous process and continues till equilibrium is achieved
Option C
- Osmosis is a special type of diffusion and requires a semipermeable membrane.
- It is a diffusion process, not osmosis because movement takes place from a permeable membrane.
Option D
- Semipermeable membranes do not allow the movement of the solute molecule to pass through.
- This process will not take place
Final answer: The movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane called osmosis is the correct definition.
Movement of water molecules from a region of higher concentration to
a region of lower concentration through a semipermeable membrane
The correct option is A
An explanation for the correct option:
- The semi-permeable membrane allows only the solvent molecules to pass through it and not the solute particles.
Example: egg membrane, parchment membrane. - Osmosis is a special type of diffusion in which water/solvent molecules move from a region of higher concentration to a region of lower concentration through a semipermeable membrane.
- It occurs when there is a difference in solvent concentration on both sides of a semipermeable membrane.
- It tends to equalize the concentrations on the two sides and maintain equilibrium.
- If the medium is hypotonic relative to the cell cytoplasm, the cell will gain water through osmosis and swells up.
- If the medium is isotonic, there will be no net movement of water across the cell membrane because equilibrium is already present
- If the medium is hypertonic relative to the cell cytoplasm, the cell will lose water by osmosis and shrink.
- This occurs in the roots of plants to transfer water from the soil.
- Osmotic pressure is more if the concentration difference is more on both sides.
- Osmotic pressure is the minimum pressure applied on the more concentrated side to prevent the entry of solvent.
- Due to osmotic pressure, we can purify water by reverse osmosis.
Explanations for the incorrect option:
Option B
- It is called diffusion.
- Diffusion means the movement of particles ( solute or solvents) from the region of their higher concentration to the region of their lower concentration.
- Diffusion depends on the size and shape of the particle need to be diffuse
- Diffusion can be of ant particle not necessarily water/ solvent.
- It is a spontaneous process and continues till equilibrium is achieved
Option C
- Osmosis is a special type of diffusion and requires a semipermeable membrane.
- It is a diffusion process, not osmosis because movement takes place from a permeable membrane.
Option D
- Semipermeable membranes do not allow the movement of the solute molecule to pass through.
- This process will not take place
Final answer: The movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane called osmosis is the correct definition.
