Question 12
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
Question 12
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
The answer is option (ii).
Ozone is used to disinfect water. Water disinfection is done to remove impurities and microbes from water which is obtained from the wastewater treatment plant before it is released into the distribution system. The addition of chemicals like chlorine and ozone helps to remove these impurities and microbes and make the water fit for human consumption. Ozone also absorbs ultraviolet rays and thus protect us from the harmful rays.
The answer is option (ii).
Ozone is used to disinfect water. Water disinfection is done to remove impurities and microbes from water which is obtained from the wastewater treatment plant before it is released into the distribution system. The addition of chemicals like chlorine and ozone helps to remove these impurities and microbes and make the water fit for human consumption. Ozone also absorbs ultraviolet rays and thus protect us from the harmful rays.
