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Sunlight is a ________ method of disinfection.

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+2 votes
in Environmental Engineering by (81.4k points)
Sunlight is a  ________ method of disinfection.

(a) Physical

(b) Chemical

(c) Mechanical

(d) Electrical

The question was asked during an interview.

My doubt is from Methods of Disinfection topic in chapter Properties of Disinfection of Environmental Engineering

1 Answer

+2 votes
by (693k points)
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Best answer
Right option is (a) Physical

Easy explanation: Sunlight is a natural disinfection. Irradiation by ultraviolet rays promotes disinfection.

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