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Why does water covered with excessive al...

Why does water covered with excessive algal growth become polluted ?

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VMC MODULES ENGLISH-ENVIRONMENTAL CHEMISTRY-JEE Main (Archive)
  1. Why does water covered with excessive algal growth become polluted ?

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  2. When rain is accompanied by a thunderstorm, the collected rain water w...

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  3. Smog is essentially caused by the presence of

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  4. Identify the wrong statement among the following :

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  5. Which one of the following statement is not true ?

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  6. Which one of the following statements regarding photochemical smog is ...

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  7. The gas leaked from a storage tank of the Union Carbide plant in Bhopa...

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  8. Photochemical smog consists of excessive amount of X, in addition to a...

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  9. Addition of phosphate fertilizers to water bodies cause

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  10. The concentration of fluoride, lead, nitrate and iron in a water sampl...

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  11. BOD is

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  12. Which one of the following substances used in dry cleaning is a better...

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  13. A water sample has ppm level concentration of following anions F^(-)...

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  14. Identify the pollutant gases largely responsible for the discoloured a...

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  15. Which of the following is a set of green house gases ?

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  16. The recommended concentration of fluoride ion in drinking water is up ...

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  17. Which of the following conditions in drinking water causes methemoglob...

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  18. Water samples with BOD values of 4 ppm and 18 ppm, respectively a...

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  19. The concentration of dissolved oxygen (DO) in cold water can go upto:

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  20. The pH of rain water, is approximately : a) 5.6 b) 7.5 c) 7.0 d) 6.5

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  21. The reaction that is NOT involved in the ozone layer depletion mechani...

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