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Water is said to be polluted if the D.O ...

Water is said to be polluted if the D.O value of water is less than

A

152 ppm

B

4 ppm

C

50 ppm

D

100 ppm

Text Solution

Verified by Experts

The correct Answer is:
B
4 ppm
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AAKASH SERIES-ENVIRONMENTAL CHEMISTRY-ADDITIONAL PRACTICE EXERCISE (LECTURE SHEET)
  1. Which of the following can act as sink for CO2 and SO2

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  2. Water is said to be polluted if the D.O value of water is less than

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

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

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

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

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

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

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  9. The source of CO2 in the atmosphere is

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  10. Which is incorrect about 'green house effect'

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

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  12. Ozone is useful in and harmful in

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  13. Carcinogenic pollutant is

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

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  15. Depletion of ozone layer causes

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

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

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

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

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  20. Eutrophication is mainly caused by

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