Question

Q 3) Class VII students went for an educational trip to see how various industries and human

settlements around river Yamuna, in Delhi are polluting it. They saw that factory wastes and

municipal wastes were dumped into it untreated. They thought of spreading an awareness

programme. They even wrote to Municipal Corporation of the state suggesting ways to reduce this

kind of pollution.

(a) How does untreated factory waste affect the quality of river water?

(b) How is neutralisation effective in changing the quality of water?

(c) Why is it important to check river water pollution?
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Answer 1

Answer:

1. the untreated waste from factories like chemicals, polluted water toxicate the river water.

2. because it can neutralise the toxicity present in water .

3. because river water is home to lot's of aquatic animals and also a basic need of us and polluted water is harmful for both the aquatic animals and us .