Which of the following statements about ozone are correct?
I It is essential for breathing of living organisms.
II It is used to disinfect water.
III It absorbs ultraviolet rays.
IV Its proportion in air is about 3%.
(a) I and II
(b) II and III
(c) I and III
(d) II and IV
Answers
Answered by
6
Ans is l and lll.
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Answered by
2
Answer:
Answer is B according to me
Explanation:
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