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Heavy Metal Poisoning

If BOD value ...

Question

If BOD value is greater than 17 ppm, then water belongs which of the following to category?

A

Normal water

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B

Highly polluted water

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C

Usable water

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D

Slightly polluted water

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Solution

The correct option is C Highly polluted water
Clean water would have BOD value of less than 5 ppm whereas highly polluted water could have BOD value 17ppm or more.

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Heavy Metal Poisoning

Standard XII Biology

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