Question

22. Which of the following dissolved gases are present
in drinking water?
(a) oxygen and nitric oxide
(b) oxygen and carbon monoxide
(c) oxygen and carbon dioxide
(d) oxygen and nitrogen

Answer 1

Answer:

(c) oxygen and carbon dioxide

Explanation:

The main gases dissolved in purified water are oxygen and carbon dioxide, plus traces of inert gases, all in equilibrium with ambient air.

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Answer 2

Answer:

Option C

Oxygen and carbon dioxide