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Assertion: In extraction of copper from ...

Assertion: In extraction of copper from chalcopyrite after roasting in supply of air ai moderate temperature, the temperature of the roasting ore is increased above the fusion temperature and then silica is added in reverberatory furnace.
Reason: In the extraction of copper from chalcopyrites during smelting, the impurity of iron is removed as fusible slag `(FeSIO_(3))` in blast furnace or reverberatory furnace.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If assertion is false but reason is true.

Text Solution

Verified by Experts

The correct Answer is:
D
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Assertion: Silica is added as a flux in reverberatory furnace, in the extrcation of copper from copper phyrites. Reason: Silica decreases the melting point of the ore and increases the conductivity.

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