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Q.

Which of the following process makes the ore porous?

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a

Reduction

b

Calcination

c

Distillation

d

Roasting

answer is A, B.

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Detailed Solution

In both roasting and calcination processes, ore is heating in presence of air or absence of air to convert into metal oxide. During this process , volatile impurities and hydrated moisture are removed from Ore. Finally, the Ore become porous.

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