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Which one of the following statements...

Which one of the following statements is not true ?

A

1. pH of drinking water should be between 5.5-9.5

B

2. Concentration of DO below 6 ppm is good for the growth of fish.

C

3. Clean water would have BOD value of less than 5 ppm.

D

4. Oxides of soulphur . Nitrogen and carbon are the most widespred air pollutant.

Text Solution

Verified by Experts

The correct Answer is:
B
Fish dies in water bodies pollution by sewage due to decrease in dissovle oxygen (D.O)
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MODERN PUBLICATION-ENVIROMENTAL POLLUTION-MULTIPLE CHOICE QUESTION (LEVEL II)
  1. Which of the following statements is wrong ?

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  2. Sewage containing organic waste should be disposed in water bo...

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  3. The gaseous envelope around the arth is known as atmosphere. Th...

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  4. Dinitrogen and dioxygen are main constituents of air but these do n...

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  5. The pollution which come directly in the air from sources are call...

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  6. Which of the following practices will not come under green chemi...

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  7. The factor responsible for highest CO contamination in air is :

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  8. In Antartica ozone depletion is due to the formation of the foll...

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  9. The process of eutrophication is due to

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  10. Green chemistry means such reactions which :

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  11. The ozone layer forms naturally by

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  12. Which one of the following statements is not true ?

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  13. Excess nitrate in drinkin water can cause

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  14. The gas emitted by spersonic jet planes that slowly depletes the ...

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  15. C CI(4) and freons

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  16. The smog is essentially caused by the presence of :

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  17. In Antartica ozone depletion is due to the formation of the foll...

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  18. Identify the wrong statement from the following:

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  19. Which one of the following statement regarding photochemical smog ...

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  20. Ozone depletion is initiated by

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