Pick up wrong statement about wrought iron
A. It contains carbon of the order of 0 to 0.25%
B. It melts at 1535°C
C. It is very soft and ductile
D. It is made by adding suitable percentage of carbon to molten iron and subjecting the product to repeated hammering and rolling
Answer: Option B
Solution (By Examveda Team)
Option A: Correct. Wrought iron contains very low carbon, generally less than 0.08%, but often described as being in the order of 0 to 0.25%.Option B: Incorrect. The melting point of pure iron is about 1535°C. Wrought iron, due to impurities such as slag, has a slightly lower melting point, usually around 1500°C or even lower. Hence, this statement is wrong.
Option C: Correct. Wrought iron is very soft, malleable, and ductile because of its low carbon content.
Option D: Partially misleading but acceptable in context. Wrought iron is produced by removing carbon and impurities from pig iron, and the hammering/rolling process helps eliminate slag inclusions and improves its structure. It is not made by adding carbon, but the focus is on refining.
Therefore, the wrong statement about wrought iron is: Option B: It melts at 1535°C.
This Question Belongs to Mechanical Engineering >> Engineering Materials
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Carbon content less then 0.1% sulphur 0.25% & bend by hammer
Wrong carbon contain less than 0.10% & sulphur near 0.25% & wrought iron bended