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Wastewater Story
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13/07/2021 4:37 pm
Topic starter
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?
(i) (a), (b) and (c)
(ii) (b) and (c)
(iii) (a) and (d)
(iv) All four
1 Answer
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13/07/2021 4:38 pm
(ii) (b) and (c)