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The amount of oxygen used by micro organ...

The amount of oxygen used by micro organisms present in water for five days at `20^@C` is called

A

COD

B

DO

C

TLV

D

BOD

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The correct Answer is:
D
BOD
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The amount of oxygen used by the suitable microorganisms present in water during five days at 20^(@)C is called as BOD. For pure water BOD is about 1 ppm fairly pure water 3 ppm and doubtful purity 5 ppm the municipal sewage has BOD values 100-4000 ppm. BOD= Number of moles of O_2 required / Number of liters of water sample If water is polluted its BOD value is

The amount of oxygen used by the suitable microorganisms present in water during five days at 20^(@)C is called as BOD. For pure water BOD is about 1 ppm fairly pure water 3 ppm and doubtful purity 5 ppm the municipal sewage has BOD values 100-4000 ppm. BOD= Number of moles of O_2 required / Number of liters of water sample The BOD value of municipal sewage is

The amount of oxygen used by the suitable microorganisms present in water during five days at 20^(@)C is called as BOD. For pure water BOD is about 1 ppm fairly pure water 3 ppm and doubtful purity 5 ppm the municipal sewage has BOD values 100-4000 ppm. BOD= Number of moles of O_2 required / Number of liters of water sample BOD is normally cxpressed for a time period of

The amount of oxygen used by the suitable microorganisms present in water during five days at 20^(@)C is called as BOD. For pure water BOD is about 1 ppm fairly pure water 3 ppm and doubtful purity 5 ppm the municipal sewage has BOD values 100-4000 ppm. BOD= Number of moles of O_2 required / Number of liters of water sample The BOD values of three water sample x,y and z are 5 mg/litre, 16 mg/Litre and 400 mg/Litre respectively the more polluted sample of water is

The amount of oxygen required to oxidies organic substance present in water is called

The amount of oxygen required to oxidise organic substance present in water is called

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AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-ADDITIONAL PRACTICE EXERCISE (LECTURE SHEET)
  1. Water is said to be polluted if the D.O value of water is less than

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  2. The amount of oxygen required for healthy growth of plants and animals...

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  3. The amount of oxygen used by micro organisms present in water for five...

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  4. Which of the following is a measure of bacteria present in water

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  5. Which of the following does not indicate high level of pollutants or t...

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  6. The study of toxicity of organo metallic compounds is termed as

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  7. The level of CO gas in air that causes immediate death is

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  8. The source of CO2 in the atmosphere is

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  9. Which is incorrect about 'green house effect'

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  10. The species formed in the depletion of ozone layer by chlorotlurocarbo...

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  11. Ozone is useful in and harmful in

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  12. Carcinogenic pollutant is

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  13. Which of the following is a sink for CO ?

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  14. Depletion of ozone layer causes

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  15. The type of hybridisation of carbon atoms of the molecule of the gas i...

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  16. The non-viable particulate is among the following is

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  17. The loss or reduction of chlorophyll in the leaves is termed as

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  18. Increase in concentration of pollutant by the process of food chains i...

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  19. Eutrophication is mainly caused by

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  20. Which of the following is not an algae nutrient?

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