The main impurity in iron ore during the extraction of iron is
-
Silicon (IV) oxide
- Carbon (IV) oxide
- Calcium trioxosilicate
- Sulphur (II) oxide
The correct answer is: A
Explanation
Iron ore is typically found with various impurities, with the main impurity being silicon dioxide (SiO\(_2\)). To remove silicon dioxide from iron ore, calcium oxide (CaO) is added to the blast furnace. This is a neutralization reaction because silicon dioxide is acidic and calcium oxide is basic.
CaO\(_{(s)}\) + (SiO\(_2\))\(_{(s)}\) → CaSiO\(_2\)\(_{(s)}\).
Base Acid
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