Question

oxygen concentration on surface of river is A. 1% B. 5% C. 10% D. more than 10%​

Answer 1

Answer:option d more than 10%

Explanation:

It is approximately 20.9%

Answer 2

The correct answer for this question will be more than 10%

So, the right choice will be option D.

OTHER POINTS -

1. Oxygen which remains dissolved in water is very necessary for the aquatic organisms living there for their survival.

2. The amount of dissolved oxygen in water is measured by devices like oxygen meters or the chemical tests kits.