Pig-iron is brittle because it contains

Assessment: WAEC SSCE - Chemistry - 2007 (Objective) Subject: Chemistry

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Pig-iron is brittle because it contains
Answer Details
Pig-iron is brittle because it contains a high percentage of carbon as impurity. Pig-iron is the product obtained from the smelting of iron ores in a blast furnace. It is a crude form of iron and contains about 4% carbon, along with other impurities such as silicon, sulfur, and phosphorus. The high percentage of carbon in pig-iron makes it brittle and weak, as it tends to form carbon inclusions in the iron matrix, leading to cracks and fractures under stress. Therefore, pig-iron needs to be refined further to remove impurities, including carbon, to make it stronger and more ductile.
Read lesson note on Chemistry Of Carbon Compounds (Nigeria Only) (WAEC)
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