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What is C.O.D. ? What is siltation?...

What is C.O.D. ? What is siltation?

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The total amount of oxygen which is used for the complete oxidation of both the biodegradable and nonbiodegradable pollutants present in water expressed in ppm is called the chemical oxygen demand (CCD).
Siltation is the process of mixing of soil particles with water creating turbidity for which free movement of aquatic organism is hindered resulting decrease in their production and growth.
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PATHFINDER-ENVIRONMENTAL CHEMISTRY-QUESTION BANK
  1. Name the diseases caused by Hg and Cd contamination of water. What is ...

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  2. What is Eutrophication? Write its harmful effect.

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  3. What is C.O.D. ? What is siltation?

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  4. What is TLV?

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  5. What is 'Pneumoconiosis?

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  6. Write down the main characteristics of drinking water.

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  7. Mention two harmful effects of photochemical smog?

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  8. How does the ozone layer depletion and a preventive measure that can b...

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  9. What is feron? Mention one of its effect.

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  10. Give examples of a sink of CO and two sinks of CO2

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  11. Dissolved oxygen values of four water samples A, B, C and D are respec...

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  12. Biochemical oxygen demand value of four water samples P, Q, R and S ar...

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  13. Threshold limit value of three pollutant X,Y and Z are respectively 9 ...

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  14. DO value of a water sample is 6 ppm. Calculate the weight of dissolved...

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  15. 100 ml of a sample of water required 1.96 mg of potassium dichromate i...

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  16. COD value of a water sample is 40 ppm, Calculate the amount of acidifi...

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  17. Ozone is harmful in the environment segment X but is useful in the env...

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  18. Freons are boon to industry, but curse to environment,justify

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  19. Bleaching og paper with hydrogen peroxide is preferred now-a-day .Why?

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  20. TLV value of four pollutants A, B C and D are 2ppm, 9 ppm, 20 ppm and ...

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