$A$ water sample is reported to be highly polluted if the $BOD$ (Biological Oxygen Demand) value of the sample becomes:
- Amore than $17 \ ppm$
- Bequal to $10 \ ppm$
- Cequal to $5 \ ppm$
- Dless than $5 \ ppm$
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The living organisms or the surroundings of the earth's composition are known as .....
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View SolutionWhich of the following statement$(s)$ is (are) incorrect reason for eutrophication?
$A$. excess usage of fertilisers
$B$. excess usage of detergents
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$D$. lack of nutrients in water bodies that prevent plant growth
Choose the most appropriate answer from the options given below:
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$D$. lack of nutrients in water bodies that prevent plant growth
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$A$ water sample is considered the cleanest based on which of the following $BOD$ values (in $ppm$)?
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Which of the following is a set of greenhouse gases?
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