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Which of the following statement is not ...

Which of the following statement 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 `5ppm`.

D

oxdation by air `H_(2)O_(2)` and `O_(3)`

Text Solution

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The correct Answer is:
B
The ideal value of `DO` for growth of fishes is `8mg//L. 7mg//L` is desirable range, below this value fishes get susceptible to disease. A value of `2 mg//L` or below is lethal for fished.
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