Q. Consider the following statements regarding osmosis:

1. Solvent moves from a region of low solute concentration to high solute concentration.
2. Osmosis requires a semipermeable membrane for its operation.
3. Reverse osmosis is a process utilized in desalination of water.

Which of the above statements is / are correct?
Answer: 1, 2 and 3
Notes: All three statements are correct. Osmosis involves the movement of solvent from low to high solute concentration through a semipermeable membrane. The semipermeable membrane is necessary for osmosis to occur. Reverse osmosis, by applying external pressure, is commonly employed for desalination by moving water against its concentration gradient.