Chapter 10: Wastewater Story

Q&A -Ask Doubts and Get Answers

Wastewater Story


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


Ozone is the inorganic compound that prevents us from harmful rays coming from the sun. It is not essential for the breathing of living organisms. Ozone is a powerful disinfect that is used to treat water. Its proportion is less than 1% in the air.

Hence, only statements (b) and (c) are correct.

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