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Q.

Which one of the following is the major impurity in pig iron?

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a

Silicon

b

Sulphur

c

Graphite

d

Phosphorus

answer is C.

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Detailed Solution

It is an impure form of iron cast into blacks (Pigs) obtained from iron over by blast furnace process. 

Graphite is the major impurity in pig iron. Pig-iron is later converted into cast iron or steel. 

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