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1
Which of the following groups contain only biodegradable items ?
Grass, flowers and glass
Grass, wood and Plastic
Fruit-peels, cake and lime-juice
Cake, wood and glass
2
Among the most dangerous non-biodegradable waste is ______________________
Cow-dung
Plastic articles
Garbage
Radioactive waste
3
Which of the following gases can destroy the ozone layer by reacting with it?
Helium
Argon
Chlorofluorocarbons
Both (2) and (3)
4
Paper bag
Polythene bag
Jute bag
Cotton cloth bag
5
We can recycle :
Only biodegradable waste.
Only nonbiodegradable waste.
Both biodegradable and nonbiodegradable waste.
Neither of them
6
Which of the following is a non-biodegrable substance?
DDT
Manure
Paper
Cotton cloth
7
What are the three R's of waste management ?
Reduce, Reuse and Recycle
Retain, Reuse and Recreate
Refill, Reuse and Recycle
None of the above
8
The waste produced in our houses like kitchen waste, electronic waste, cleaning waste etc. is known as _____________________ .
Domestic waste
Industrial waste
Chemical waste
None of these .
9
Which of the following is a bio - degradable waste ?
Chalk box
Faeces and urine
Pencil scrap
All of these
10
Agricultural waste includes ___________
Cattle waste
Weed
poultry waste
All of the above
11
How many oxygen atoms are present in an ozone molecule?
12
Mr A and Mr. B are the two farmers, one using manure in his crops and other is using fertilizers as DDT in his crops. Mr. B got more vegetables from his land as compared to Mr. A. But people like to buy the vegetables from Mr. A. Why ?
Excess of fertilizers decrease the level of nutrients in crops.
People are more aware for their health, they know manure is better than artificial fertilizer.
Organic farming is better option.
13
When somethings in garbage rots completely and did not smell, well, it ________________
Can be mixed with soil to provide nutrients to plants
Become manure
Both A and B
14
How does oxygen changes to ozone in the atmosphere ?
By splitting of Oxygen molecule in to free oxygen
By combining of free oxygen
Ozone has no relation with oxygen atoms
15
The chemical pesticides mix up with soil and water and are absorbed by the growing plants along with water and other minerals . pesticides enter the food chain at the producer level and in the process of transfer of food through process of transfer of food through trophic levels, these harmful chemicals gets concentrated at each trophic level.this phenomenon is know as ____________________________
Bioremediation
Biodegradation
Biological magnification
Biological organisation