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Q.

The purest form of commercial iron is

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a

Pig iron

b

Cast iron

c

Wrought iron

d

Pig iron and cast iron

answer is C.

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Detailed Solution

  • Wrought iron is a form of commercial iron having a very low carbon content (less than 0.10%), the impurities such as sulfur, phosphorus, silicon and manganese are less than 0.25%. 
  • It has the largest amount of pure iron in its constituents and is hence known as the purest form of commercial iron.
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