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Name the world's most problematic aq...

Name the world's most problematic aquatic weed.What is the natural of the water body in which the weeds grow abundantly?

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(i) Water hyacinth (Eichhornia crassipes).
(ii) Eutrophic water/Stagnant water .
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OSWAAL PUBLICATION-ENVIRONMENTAL ISSUES -TOPIC - 2 ( MULTIPLE CHOICE QUESTIONS.)
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  3. According to the Central Pollution Control Board, particle that are...

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  4. The material generally used for sound proofing of rooms like a record...

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  5. Compressed Natural Gas (CNG) is :

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  6. World's most problematic aquatic weed is :

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  7. Which of the following causes biomagnification ?

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  8. The expanded form of DDT is :

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  9. Which of the following material takes the longest time of biodegrad...

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  10. Choose the incorrect statement.

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  11. Among the following which one causes more indoor chemical pollution...

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  12. The green scum seen in the fresh water bodies is :

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  13. The loudness of a sound that a person can withstand without discomfort...

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  14. The major source of noise pollution , world wide is due to :

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  15. Match correctly the following and choose the correct option: The...

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  16. Catalytic converters are fitted into automobiles to reduce emission of...

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  17. Why is it necessary to remove sulphur from petroleum products?

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  18. Which one of the following impurities is easiest to remove from waste ...

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  19. Which one of the following diseases is not due to contamination of wat...

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  20. Nuisance growth of aquatic plants and bloom forming algae in natural w...

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  21. Algal blooms impart a distinct colour to water due to:

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