Question 37
Metals and their CompoundsWhich of the following additives could improve the quality of steel?
- A.Silicon
- B.Sulphur and phosphorus
- C.Carbon
- D.Chromium and nickel
Show the answer and explanation
Answer: D (Chromium and nickel)
Explanation
Alloying steel with chromium and nickel makes stainless steel, which is hard and resists rusting. Sulphur and phosphorus make steel brittle.