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Which chemical is used In fire extinguis...

Which chemical is used In fire extinguishers? How is it harmful?

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(i) Chlorofluorocarbons are used in fire extinguishers.
(ii) It depletes the ozone layer.
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ZEN PUBLICATION-OUR ENVIRONMENT -ZEN ADDITIONAL QUESTIONS SECTION ( VERY SHORT ANSWER [VSA] TYPE QUESTIONS )
  1. Decomposers are referred to as "nature's cleansers". Why?

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  2. Why are green plants called producers ?

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  3. Define ecosystem.

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  4. Which chemical is used In fire extinguishers? How is it harmful?

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  5. Why is a food chain having two steps, the most advantageous in terms o...

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  6. ldentify which one of the following would have a hazardous impact if i...

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  7. List two ways by which biodegradable substances would affect the envir...

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  8. Select from the following the substances which pose a threat to the en...

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  9. State any two practices which can help In the protection of our eviron...

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  10. What percentage of energy of sunlight is captured by green plants when...

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  11. Flow of energy is unidirectional Name the first two components of the ...

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  12. Name the radiations from the sun that are absorbed by the ozone layer....

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  13. What percentage of energy available at the producer level is transferr...

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  14. Why should blodegradable and non-blodegradable wastes be discarded In ...

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  15. Why has the Indian Government banned the use of polythene bags?

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  16. State two advantages of paper bags over plastic bags during shopping

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  17. Name one natural and one man-made ecosystem.

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  18. In a food chain why does the maximum amount of pesticides get accumula...

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  19. Reuse of plastic products is berter than recycle method. Why ?

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  20. Micro-organisms like bacteria are called decomposers. Why?

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