What is the role of ultraviolet (UV) radiation in the water purification systems? 1 It inactivates/kills the harmful microorganisms in water. 2 It removes all the undesirable odours from the water. 3 It quickens the sedimentation of solid particles, removes turbidity and improves the clarity of water. Which of the statements given above is/are correct?

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CollectorBabu · Accepted Answer

Correct Answer: 1 only. Ultraviolet radiations are used in purification of water as it provides safe solution for chlorine-resistant micro organisms that causes thousands of health diseases as with this, the frequency of killing micro-organisms will be around 254 nanometers. It does not remove any contaminants from water like metals, salts, chlorine or pharmaceuticals and will result in changing the taste, odour or colour of water. It shows that statement 1 is correct while both statements 2 and 3 are incorrect, so correct option is A..

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