Study the following statements about ozone :-
I) it is essential for breathing of living organisms
ll) it is used to disinfect water
iii) it absorbs ultra violet rays
lV) it's proportion in air is about 3%
Which of the above statement are correct :-
a) i,ii and iii
b) ii and iii
c) i and iv
d) All
Answers
Answered by
1
Answer:
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Answered by
1
Answer:
it is used to disinnfet water
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