Question

The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range $900-1500K$ is(are)

• A. Limestone is used to remove silicate impurity.
• B. Pig iron obtained from blast furnace contains about $4\%$ carbon.
• C. Coke (C) converts $C{O}_2$ to $CO$.
• D. Exhaust gases consist of $N{O}_2$ and $CO$.

Answer 1

Answer: (A), (B), (C)

(A) $CaO+Si{O}_2\to CaSi{O}_3$ (in the temperature range $900-1500K$ )
(B) In fusion zone molten iron becomes heavy by absorbing elemental impurities and produces Pig iron. (in the temperature range $900-1500K$ )
(C) $C+C{O}_2\to 2CO$ (in the temperature range $900-1500K$ )
(D) Exhaust gases does not contain $N{O}_2$.