First slide

General methods of extraction of elements from the earth crust

Question

In Fe extraction, the roasting is carried out because

Moderate

A

All FeO be converted to Fe₂O₃
B

The formation of FeSiO₃ slag is prevented
C

Fe₂O₃ does not react with SiO₂ to form slag
D

The formation of slag (CaSiO₃) is enhanced

Solution

Slag is removed in the blast furnance itself.

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