A sample of air was bubbled into water. The PH of the water slowly changed from 7 to 6. Which of the following gases in the samples caused the change?

A. carbon(iv)oxide
B. carbon(ii)oxide
C. nitrogen
D. oxygen

Correct Answer:

Option A – carbon(iv)oxide

Explanation

An acid gas is any gaseous compound which, when dissolved in water, will form an acidic solution

The most common acid gases are hydrogen sulfide (H2S) and carbon dioxide (CO2) gases

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