Question

The correct sequence of water purification is:

• A. sedimentation, filtration, decantation, chlorination
• B. sedimentation, decantation, filtration, chlorination
• C. sedimentation, chlorination, decantation, filtration
• D. chlorination, sedimentation, decantation, filtration

Answer 1

The correct option is A

sedimentation, filtration, decantation, chlorination

Correct option explanation:

Process followed for water purification :

• Water from the reservoir is directed to a sedimentation tank where insoluble solids settle. Then, water enters the loading tank where suspended impurities are sedimented.
• Next, water is directed to a filtration tank where all the suspended impurities are removed.
• Pure form of water is separated by decantation. This is done by pouring out the clear upper layer of liquid.
• Finally, water enters the chlorination tank where water is treated with chlorine to kill any bacteria present in the drinking water.