Chapter 10: Wastewater Story

Q&A -Ask Doubts and Get Answers

Q
Wastewater Story

Question:

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

Answer:

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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