MCQ
Study the following statements about ozone:
a) It is essential for breathing of living organisms.
b) It is used to disinfect water.
c) It absorbs ultraviolet rays
d) Its proportion in air is about 3%.
Which of these statements are correct?
Options
(a), (b) and (c)
(b) and (c)
(a) and (d)
All four
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Solution
(b) and (c)
Concept: Wastewater Treatment Plant ((WWTP))
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