Thermal decomposition producing sulfur oxides

Steps:

• Recall acid rain forms from atmospheric SO₂ and SO₃ reacting with water to make H₂SO₄.
• Identify gaseous products in each reaction that match these pollutants.
• Check reaction balance to ensure validity.
• Select the balanced reaction yielding SO₂(g) and SO₃(g).

Why D is correct:

• 2FeSO₄(s) → Fe₂O₃(s) + SO₂(g) + SO₃(g) is balanced and produces SO₂ and SO₃, which oxidize in air to form H₂SO₄ causing acid rain.

Why the others are wrong:

• A: Produces NH₃(g), a base not linked to acid rain.
• B: Consumes SO₂(g) as reactant, no pollutant product.
• C: Unbalanced (1 Fe and 1 S on left, 2 each on right), invalid reaction.

Final answer: D