Question

The correct option(s) related to the extraction of iron from its ore in the blast furnace operating in the temperature range $900-1500 K$ 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 $CO _2$ to $CO$.
• D. Exhaust gases consist of $NO _2$ and $CO$.

Answer 1

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

Limestone is used to remove silicate impurity.

Answer 2

The correct options are (A), (B) and (C).