• # question_answer Which one of the following statement is not true? A)  pH of drinking water should be between 5.5-9.5B)  Concentration of DO below 6 ppm is good for the growth of fish.  C)  Clean water would have a BOD value of less than 5ppm.D)  Oxides of sulphur, nitrogen and carbon are the most widespread air pollutant.

Correct Answer: B

Solution :

The ideal value of D.O for growth of fishes is $8mg/\ell$ . $7mg/\ell$ li is desirable range, below this value fishes get susceptible to disease. A value of $2mg/\ell$ or below is lethal for fishes.

You need to login to perform this action.
You will be redirected in 3 sec