Q4 of 27 Page 93

Open drain system is a breeding place for which of the following.

Open drains are very dangerous and harmful as it is a breeding place for all the disease-causing organisms, flies, mosquitoes etc.

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2

Sewage is mainly a

 3

Which of the following is/are products of wastewater treatment?

 5

Water polluted by various human activities causes a number of water borne diseases. Which of the following is not a water borne disease?

 6

Pick from the following one chemical used to disinfect water.