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World's most problematic aquatic weed is...

World's most problematic aquatic weed is 
(A) Azolla
(B) Wolffia
(C) Eichhornia
(D) Trapa

A

Azolla

B

Wolffia

C

Eichornia

D

Trapa

Text Solution

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The correct Answer is:
C
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KUMAR PRAKASHAN-ENVIRONMENTAL ISSUES-Section - F (Multiple Choice Question (MCQs))(MCQs FROM .DARPAN. BASED ON TEXTBOOK)
  1. The green scum seen in the fresh water bodies is :  (A) blue-green al...

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

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  3. World's most problematic aquatic weed is  (A) Azolla (B) Wolffia ...

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  4. Compressed Natural Gas (CNG) is  (A) propane (B) Methane (C) etha...

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

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

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  7. Raising crop on the resulting ash due to firing of trees is called as

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  8. In 3-R policy of urban solid management which of the following is invo...

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  9. Montreal Protocol aims by

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  10. DDT residues are rapidly passed through food chaln causing biomagnific...

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  11. Organisms called methanogens are most abundant in a

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  12. Eutrophication is often seen in

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  13. Lichens are described as indicators of

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  14. If a water body is contaminated with a toxicant, its biomaginification...

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  15. The zone of atmosphere in which the ozone layer is present is called

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  16. Which of the following in sewage treatment removes suspended solids?

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  17. Depletion of which gas in the atmosphere can lead to an increased inci...

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  18. A scruber in the exhaust of a chemical industrial plant removes:

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  19. An International treaty on ozone depletion known as Montreal Protocol ...

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  20. Which type of pollution causes from power plants?   (A) Air (B) L...

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