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Which of the following statements are not correct?

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Copper is extracted by self reduction method.

Cast iron is the purest form of iron.

The composition of malachite ore is

$Cu (OH)_{2} \cdot 2 {CuCO}_{3}$

Cupellation process is used for the refining o Ag and Au.

answer is B.

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Detailed Solution

Cast iron is the purest form of iron and The composition of malachite ore is $Cu (OH)_{2} \cdot 2 {CuCO}_{3}$ statements are not correct.

Malachite is a copper carbonate hydroxide mineral with the chemical formula $[C u_{2} C O_{3} (O H)_{2}] .$

Wrought Iron is the purest form of iron.

Hence statement B and C are incorrect.

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