The gaseous pollutant sulphur (IV)oxide is most likely to be detected in fairly reasonable quantities in the area around a plant for the
extraction of aluminium from bauxite
production of margarine
smelting of copper
production of chlorine from brine
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Let's figure out where we'd find sulfur (IV) oxide, also known as sulfur dioxide (SO₂), as a pollutant.
* A. Extraction of aluminum from bauxite: This process mainly involves aluminum oxide, and it doesn't typically release large amounts of sulfur dioxide.
* B. Production of margarine: This is a food processing industry, and it doesn't involve reactions that would produce sulfur dioxide.
* C. Smelting of copper: Copper ores often contain sulfur. When copper is extracted by smelting, the sulfur in the ore reacts with oxygen to form sulfur dioxide.
* D. Production of chlorine from brine: This process uses salt (brine) and electricity, and it doesn't produce significant amounts of sulfur dioxide.
Therefore, the area around a plant for the C. smelting of copper is most likely to have noticeable amounts of sulfur (IV) oxide. When copper ore is heated, often, it contains Sulphur, and that Sulphur is released as Sulphur dioxide.


