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प्रश्न
The question has four options. Choose the correct answer:
A huge quantity of sewage is dumped in a river. The BOD will
विकल्प
increase
decrease
slightly decrease
remain unchanged
उत्तर
increase
APPEARS IN
संबंधित प्रश्न
Give any two ways in which biodegradable substances would affect the environment.
Differentiate between degradable and non-degradable type of waste.
Give a reason for the following :
Why is municipal sewage is first separated into degradable and non-degradable wastes?
The question has four options. Choose the correct answer:
Continuous sewage flow into a stream would lead to
Can you make something useful of these waste material?Powder containers, cold-drink cans, plastic bottles, shoe-box.
Which of the following is the best way for disposal of vegetable and fruit peels?
Differentiate between biodegradable and non-biodegradable substances. Cite examples.
Read the items mentioned in Columns I and II and fill in the related process in Column III
| Column I | Column II | Column III | |
| (a) | Organic waste | Earthworms | (i) ______ |
| (b) | Garbage | Dig pit and fill it with garbage | (ii) ______ |
| (c) | Old newspaper | Paper bags | (iii) ______ |
Write one difference between biodegradable and non-biodegradable wastes. List two impacts of each type of the accumulated waste on environment if not disposed off properly.
Give two examples of Non-biodegradable wastes.
