The main difference between cast iron is

Chemistry General Principles and Processes of Isolation of Elements ( Not In Syllabus ) General Single Correct MCQ

Published on: August 11, 2026

Cast iron is purest form of iron while pig iron is impure

Cast iron has lower carbon content (3%) as compared to pig iron (4%) and is extremely hard and brittle

Pig iron contains many impurities like S, P, Si and Mn while cast iron does not contain any impurity and can be casted into any shape.

Cast iron is soft and malleable while pig iron is extremely hard and brittle.

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The correct answer is:

: Pig iron contains about 4% C and many other impurities like S, P Si and Mn. Cast iron is made by melting pig iron with scrap iron and coke. It has slightly lower carbon content (3%) and is extremely hard and brittle.

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