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Question
Which of the following statements does not apply to reverse osmosis?
Options
It is used for water purification
In this technique, pressure greater than osmotic pressure is applied to the system
It is a passive process
It is an active process
Solution
It is an active process
Explanation:
Osmosis is a passive process so the water follows down the gradient, but in reverse osmosis, water molecules go against osmotic pressure due to a cumulative pressure gradient, so reverse osmosis requires energy to transport molecules, hence it is an active process.
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