In the extraction of iron, the waste gas from the furnace is a mixture of?

A. NH3 CO and CO2
B. CO and C
C. N2, CO and CO2
D. NH3 and CO

Correct Answer:

Option C – N2, CO and CO2

Explanation

The N2 from the hot air blast to burn the coke (48%), the CO (23%) and CO2 (21%) produced from the reduction of the iron ore Fe2O3 by carbon (the coke) are the major components of the waste from the extraction.