Single Choice

Choose the correct statement(s). I. Pig iron contains $$4\%$$ carbon along with many impurities such as $$P, S$$ and $$Si$$. II. Cast iron contains less than $$3\%$$ carbon and is extremely hard and brittle. III. Wrought iron is the purest form of commercial iron and is prepared from cast iron.

AI and III
BII and III
CI only
DI, II and III
Correct Answer

Solution

The iron obtained from Blast furnace contains about $$4\%$$ carbon and many impurities in smaller amounts (e.g., $$S, P, Si, Mn$$). This is known as pig iron.

Cast iron is different from pig iron and is made by melting pig iron with scrap iron and coke using hot air blast. It has slightly lower carbon content (about $$3\%$$) and is extremely hard and brittle.

Wrought iron or malleable iron is the purest form of commercial iron and is prepared from cast iron by oxidising impurities in a reverberatory furnace lined with haematite.

Option D is correct.

SIMILAR QUESTIONS

Metallurgy

The purest form of commercial iron is :

Metallurgy

Wrought iron is manufactured from cast iron by heating it with:

Metallurgy

Which of the the following has lowest percentage of carbon?

Contact Details