Identify the correct statement from the following:

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Wrought iron is impure iron with 4% carbon.

Vapour phase refining is carried out for nickel by the Van Arkel method.

Pig iron can be moulded into a variety of shapes.

Blister copper has a blistered appearance due to the evolution of CO₂

answer is A.

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Detailed Solution

Pig iron contains about 4% carbon and mainly impurities in smaller amounts (e.g., S, P, Si, Mn). It can be moulded into a variety of shapes.
Wrought Iron: (The purest form of iron)
C is 0.2 to 0.5% and traces of S, Si, P, Mn
(i) It is soft and malleable.
(ii) It can be welded.
(iii) It can be temporarily magnetised.
Blister copper is 98% pure. It has a blistered appearance due to the evolution of SO₂
Vapour phase refining: This is used for those metals that form a volatile compound that can be subsequently decomposed to obtain metal in a pure state.
Example: Ni, Ti, and Zr.

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