Ncert Exercises & Solutions

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

1.	It is used for water purification
2.	In this technique, pressure greater than osmotic pressure is applied to the system
3.	It is a passive process
4.	it is an active process

(d) Reverse osmosis is not an active process. A process (in organisms) is considered active when its completion requires energy in from of ATR And as reverse osmosis does not consume ATP, it is a passive process, though external pressure is applied in order to carry out osmosis in a reverse direction (lower to higher). Rest of the options are true for reverse osmosis.

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