Biology
Grade-8
Easy
Question
________ forces water through a semi permeable membrane and removes pollutants.
- Reverse Osmosis
- Osmosis
- Diffusion
- Absorption
Hint:
Reverse osmosis helps to remove pollutants.
The correct answer is: Reverse Osmosis
- Reverse osmosis removes contaminants from unfiltered water, or feed water when pressure forces it through a semipermeable membrane.
- Water flows from the more concentrated side (more contaminants) of the RO membrane to the less concentrated side (fewer contaminants) to provide clean drinking water.
- The freshwater produced is called the permeate. The concentrated water left over is called waste or brine.
A semipermeable membrane has small pores that block contaminants but allow water molecules to flow through.
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