Question

Which one of the following statement is not true ?
(a) pH of drinking water should be between 5.5 – 9.5.
(b) Concentration of DO below 6 ppm 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.

Answer 1

a) pH of drinking water should be between 5.5 – 9.5.

Answer 2

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$\text{\underline{The\:correct\:option\:is:}}$ A)


pH of drinking water should be between 5.5 – 9.5.


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