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Q.

Which of the following options is incorrect?

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a

${Fe}_{2} O_{3}$ can be reduce by coke as well as aluminium

b

Red bauxite is concentrate by leaching method

c

Impure Zn is purified by either distilation or electrolytic refining method

d

Pig iron is a purest form of iron.

answer is D.

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Detailed Solution

Pig iron is not the purest form of iron.

The carbon content of steel varies between 0.002 percent and 2.14 percent by weight for pure carbon steel. Pure iron has a very low carbon concentration, which makes it brittle, ductile, and fragile. An alloy known as pig iron has a higher carbon concentration than steel, making it brittle.

Hence pig iron is not the purest form of iron.

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