Attempt this previous-year question. The correct option stays hidden until you choose.
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 the water.
Pick an option to check yourself.
• Correct Answer: A
• UV radiation inactivates microorganisms by damaging their DNA/RNA, preventing reproduction.
• It does not remove odours or turbidity; suspended particles can shield microbes and reduce UV efficacy.
Attempt Prelims MCQs or open Mains questions by paper — then continue the same bank inside the app with visual decks.
GyanGram