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Which one of the following statements is...

Which one of the following statements is not true ?

A

pH of drinking water should be between 5.5 and 9.5

B

concentration of DO below 6ppm is good for the growth of fish

C

clean water would have a BOD value of less than 5 ppm

D

oxides of sulphur, nitrogen and carbon are the most widespread air pollutant.

Text Solution

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The correct Answer is:
C
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