Question

The minimum dissolved oxygen required in water to save the aquatic life is 1 ppm 2 ppm 4 ppm 8 ppm

Answer 1

Answer:

4 ppm approx

Explanation:

So 4ppm coz aquatic life cannot survive when oxygen is below 3ppm, and so it shoupd be 5ppm to 6 ppm so in ur option the most accurate answer is 4ppm

Answer 2

Minimum Dissolved Oxygen 4 ppm

Explanation:

In the rivers and streams, the minimum level of dissolved oxygen (DO) is 4mg/L i.e 4 ppm for the survival of aquatic life.

A technique that is used to measure dissolved oxygen in the freshwater system is called as Winkler Method.

As an Indicator of the health of a water body, dissolved oxygen is used where higher dissolved oxygen concentration is compared with high productivity and little pollution.

However, average good fishing waters DO must be about 9.0 PPM