Question
Biology Question on Transport in Plants
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 a passive process
D
It is an active process
Answer
It is a passive process
Explanation
Solution
Reverse osmosis is also known as hyperfiltration. It is a technique that allows the removal of water molecules from various contaminants through a semi-permeable membrane. The process requires a driving force, viz, pressure from a pump, to push the fluid through the membrane. Reverse osmosis is used in removing salts from saline water and extra purification of water.