Question 31
Metals and their CompoundsThe substance that is used in the steel industry for the removal of carbon, sulphur and phosphorus impurities from pig iron is
- A.oxygen
- B.chlorine
- C.nitrogen
- D.hydrogen
Show the answer and explanation
Answer: A (oxygen)
Explanation
In steel making, oxygen is blown through molten pig iron to oxidise carbon, sulphur and phosphorus into oxides that escape as gas or go into the slag.