Question : _______forces water through a semipermeable membrane and removes contaminants.
Option 1: Boiling
Option 2: Distillation
Option 3: Reverse Osmosis
Option 4: Filtration
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Correct Answer: Reverse Osmosis
Solution : The correct answer is Reverse Osmosis.
Reverse osmosis (RO) is a water purification process that uses a semipermeable membrane to remove impurities, contaminants and minerals from water. In reverse osmosis, water is forced through a membrane that allows water molecules to pass through while blocking the passage of larger molecules, contaminants and ions. Pressure is applied to push water through the membrane, leaving behind impurities.
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