Question

Which of the following statements does not apply to reverse osmosis?

• A. It is used for water purification.
  
• B. In this technique, pressure greater than osmotic pressure is applied to the system
  
• C. It is an active process
• D. It is a passive process
  

Answer 1

The correct option is D It is a passive process


Reverse osmosis

• Reverse osmosis is the process by which the molecules of a solvent pass through the semipermeable membrane from a region of lower concentration to higher concentration. In other words, water is made to move against the concentration gradient.
• It is an active process as energy is required for the movements of solvent molecules against the concentration gradient.
• It is used in water purification systems.

Final answer: c. It is a passive process.