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Which of the following statement is correct?

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By Expert Faculty of Sri Chaitanya
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

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detailed solution

Correct option is D

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