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O(2) is converted into O(3) by the actio...

`O_(2)` is converted into `O_(3)` by the action of :

A

infrared radiations

B

ultraviolet radiations

C

gamma radiations

D

cosmic radiations

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The correct Answer is:
B
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LAKHMIR SINGH & MANJIT KAUR-OUR ENVIRONMENT-Exercise
  1. The ten per cent law is associated with

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  2. The harmful chemical which is accumulating in human beings through foo...

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  3. O(2) is converted into O(3) by the action of :

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  4. Which of the following cannot be added in a composting pit to prepare ...

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  5. The gas A is used by most of the animals to obtain energy from food by...

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  6. The surface of water in a lake appears green due to a layer of tiny fr...

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  7. A forest ecosystem having a lot of green plants has some foxes, lions ...

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  8. A food chain consists of fish, larvae , phytoplanktons and birds. The ...

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  9. Why are some substances biodegradable and some non-biodegradable?

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  10. Give any two ways in which biodegradable substances would affect the e...

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  11. Give any two ways in which non-biodegradable substances would affect t...

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  12. What are tropic levels ? Give an example of a food chain and state the...

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  13. What is the role of decomposers in the ecosystem?

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  14. What is ozone and how does it affect any ecosystem?

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  15. How can you help in reducing the problem of waste disposal? Give any t...

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  16. Which of the following groups contain only biodegradable items?

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  17. Which of the following constitute a food-chain?

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  18. Which of the following are environment-friendly practices?

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  19. What will happen if we kill all the organisms in one trophic level?

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  20. Will the impact of removing all the organisms in a trophic level be di...

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