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Which one of the following statement is ...

Which one of the following statement is not true ?

A

oxides of sulphur, nitrogen and carbon are the most widespread air pollutant

B

pH of drinking water should be between 5.5 and 9.5

C

concentration of BOD below 6 ppm is good for the growth of fish

D

clean water would have a BOD value of less than 5 ppm

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VMC MODULES ENGLISH-ENVIRONMENTAL CHEMISTRY-JEE Main (Archive)
  1. Smog is essentially caused by the presence of

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  2. Identify the wrong statement among the following :

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

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

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

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

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  7. Addition of phosphate fertilizers to water bodies cause

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

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  9. BOD is

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

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

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

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

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

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

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

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

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

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

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  20. Peroxyacety nitrate (PAN) ,an eye irritant is produced by :

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