Question

In the upper region of blast furnace the gas helps in the reduction of iron oxide to iron is:

• A. carbon dioxide
• B. carbon monoxide
• C. hydrogen
• D. oxygen

Answer 1

The correct option is B carbon monoxide

The hot carbon monoxide is the reducing agent for the iron ore and reacts with the iron oxide to produce molten iron and carbon dioxide. Depending on the temperature in the different parts of the furnace (warmest at the bottom) the iron is reduced in several steps.

Hence, the correct option is $\left(B\right)$