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?(2012)
a) 1 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2 and 3
Answer: A
Ultraviolet water purification is the most effective method for disinfecting bacteria from the water. Ultraviolet (UV) rays penetrate harmful pathogens in your home’s water and destroy illness-causing microorganisms by attacking their genetic core (DNA).
