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 water. 3. It quickens the sedimentation of solid particles, remove

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Q: 38 (IAS/2012)
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 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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question_subject: 

Science

question_exam: 

IAS

stats: 

0,58,54,58,3,26,25

keywords: 

{'ultraviolet': [0, 0, 0, 1], 'uv': [1, 0, 1, 3], 'water purification systems': [0, 0, 0, 2], 'radiation': [0, 0, 1, 0], 'harmful microorganisms': [0, 0, 0, 1], 'water': [65, 15, 80, 129]}