Multiple choice

Which of the following statements is/are false?

a. Micro-organisms decompose the inorganic matter present in the sewage. b. Discharge of untreated sewage into water bodies is a main source of water pollution and many diseases. c. During the process of decomposition, the micro-organisms use up the sewage water's oxygen and release poisonous substances like ammonia.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The statement. micro-organisms decompose the inorganic matter present in the sewage, is  false. Micro-organisms decompose the organic matter present in the sewage.

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