The purest form of iron is
- Asteel
- Bpig iron
- Ccast iron
- Dwrought iron
- ENone of the above/More than one of the above
Show answer and explanation
Correct answer: (d) wrought iron
Explanation
Wrought iron is the purest commercial form of iron, about 99.8% iron with only 0.02–0.08% carbon. It is tough, malleable and easily welded.
Cast (pig) iron has about 2–4.5% carbon and is hard and brittle, while steel has about 0.1–1.5% carbon.