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Which one of the following statement is not true?
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a
Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant.
b
pH of drinking water should be between 5-5 and 9.5.
c
Concentration of DO below 6 ppm is good for the growth of fish.
d
Clean water would have a BOD value of less than 5 ppm.
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Correct option is C
Concentration of DO below 6 ppm is good for the growth of fish.Talk to our academic expert!
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