Which water treatment best reduces the risk of infection by killing pathogens in drinking water?
(A) Chlorination
(B) Filtration
(C) Fluoridation
(D) Precipitation - HSC - SSCE Biology - Question 1 - 2006 - Paper 1
Question 1
Which water treatment best reduces the risk of infection by killing pathogens in drinking water?
(A) Chlorination
(B) Filtration
(C) Fluoridation
(D) Precipitation
Worked Solution & Example Answer:Which water treatment best reduces the risk of infection by killing pathogens in drinking water?
(A) Chlorination
(B) Filtration
(C) Fluoridation
(D) Precipitation - HSC - SSCE Biology - Question 1 - 2006 - Paper 1
Step 1
Identify the water treatment options
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Answer
The four options presented for water treatment are: Chlorination, Filtration, Fluoridation, and Precipitation. Each has distinct roles in water treatment, with different implications for pathogen reduction.
Step 2
Evaluate each option for pathogen reduction
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Answer
Chlorination: This method involves adding chlorine to water, which is effective in killing pathogens, making it the most reliable option for disinfection.
Filtration: While filtration can remove some pathogens, it does not reliably kill them, especially viruses, leaving the potential risk of infection.
Fluoridation: This process is primarily intended for dental health and does not have a significant role in pathogen removal.
Precipitation: This method is typically used for removing specific contaminants and does not effectively kill pathogens.
Step 3
Determine the best option
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Answer
Based on the evaluation, Chlorination (Option A) is the best water treatment to reduce the risk of infection by killing pathogens in drinking water. It is widely used and recognized for its effectiveness in disinfection.
