First slide

General methods of extraction of elements from the earth crust

Question

Which of the following statement is correct?

Moderate

A

Roasting is unnecessarily done for Fe extraction because there is no sulphide ore
B

In the smelting step of Cu extraction, reduction of the ore takes place
C

Ores may not be mineral
D

Sphalerite is the ore of zinc

Solution

Sphalerite is an important ore of zinc; around 95% of all primary zinc is extracted from sphalerite ore.

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