The process of killing microorganisms in water using ultraviolet light is called:
A. Ozonation
B. Chlorination
C. UV irradiation
D. Boiling
Answer: Option C
Solution (By JKExamLibrary)
UV irradiation uses ultraviolet light to disrupt the DNA of microorganisms, rendering them unable to reproduce and cause disease. It is a physical disinfection method, leaving no chemical residue. Chlorination uses chlorine, ozonation uses ozone, boiling uses heat.
Explanation:
Sea water is trapped in shallow pans and allowed to evaporate under sunlight, leaving behind crude salt. This is then purified. Distillation gives pure water, not salt.
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