Biochemical Oxygen Demand,$(BOD)$ is a measure of organic material present in water. $BOD$ value less than $5 \ ppm$ indicates a water sample to be ..... .
- Arich in dissolved oxygen
- Bpoor in dissolved oxygen
- Chighly polluted
- Dnot suitable for aquatic life
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Similar Questions
Match the following items correctly:
List-$I$ List-$II$ $(1)$ Vegetable waste $(A)$ Takes $3$ to $5$ months for natural decomposition $(2)$ Plastic materials $(B)$ Takes $7$ to $10$ months for natural decomposition $(3)$ Agricultural waste $(C)$ Remains in original form for decades without decomposition
| List-$I$ | List-$II$ |
|---|---|
| $(1)$ Vegetable waste | $(A)$ Takes $3$ to $5$ months for natural decomposition |
| $(2)$ Plastic materials | $(B)$ Takes $7$ to $10$ months for natural decomposition |
| $(3)$ Agricultural waste | $(C)$ Remains in original form for decades without decomposition |
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View SolutionThe secondary precursors of photochemical smog are
MediumAIIMS 2014
View SolutionPhotochemical smog consists of an excessive amount of $X$,in addition to aldehydes,ketones,peroxyacetyl nitrate $(PAN)$,and so forth. $X$ is
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