Sulfur oxides (SO2) are responsible for
A) global warming.
B) greenhouse gases.
C) producing acid rain.
D) destroying the ozone layer.
The Correct Answer and Explanation is:
The correct answer is C) producing acid rain.
Explanation:
Sulfur oxides, particularly sulfur dioxide (SO₂), are primarily responsible for the formation of acid rain. This occurs when sulfur dioxide, released into the atmosphere from natural sources like volcanic eruptions and human activities such as burning fossil fuels (especially coal and oil), reacts with water vapor, oxygen, and other chemicals in the atmosphere to form sulfuric acid (H₂SO₄). When sulfuric acid combines with rainwater, it forms acid rain, which can have a pH lower than 5.6 (the normal pH of rainwater), causing significant environmental damage.
Acid rain has harmful effects on ecosystems, buildings, and human health. It can damage plant life by altering the soil’s pH, making it more difficult for plants to absorb necessary nutrients. For aquatic environments, acid rain can lower the pH of rivers and lakes, leading to the decline of aquatic species, especially those sensitive to pH changes, like fish and amphibians. Additionally, acid rain can erode historical monuments and buildings, particularly those made of limestone or marble, as sulfuric acid reacts with calcium carbonate in the stone.
While sulfur oxides contribute to air pollution, they are not directly linked to global warming (A) or greenhouse gases (B). Greenhouse gases like carbon dioxide (CO₂) and methane (CH₄) trap heat in the Earth’s atmosphere, leading to global warming, but sulfur dioxide is not one of the gases responsible for this phenomenon. Sulfur oxides also do not destroy the ozone layer (D). Ozone depletion is primarily caused by chemicals like chlorofluorocarbons (CFCs), not sulfur compounds.
In summary, sulfur oxides are most notably associated with the creation of acid rain, which has a range of damaging environmental impacts.