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संबंधित प्रश्न
Why are some substances biodegradable and some non-biodegradable?
Write note.
Plastic waste
Match the items in Column I with as many times as possible in Column II.
|
Column I |
Column II |
|
1. Cow dung |
(i) Sugarcane |
|
2. Bagasse |
(ii) Raddiwalas |
|
3. Old newspapers |
(iii) Manure |
The question has four options. Choose the correct answer:
Sewage water is purified by
The question has four options. Choose the correct answer:
Which one is the most toxic?
The question has four options. Choose the correct answer:
A huge quantity of sewage is dumped in a river. The BOD will
Choose the correct option:
The rotting of garbage is said to be completed when the garbage:
Which of the following is the best way for disposal of vegetable and fruit peels?
First link in any food chain is usually green plants because ______.
