1.

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.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.

Answer» Correct Answer - C
Assertion: `FeO +SiO_(2)rarr FeSiO_(3)`.
Reason: Reason is incorrect as `SiO_(2)` is a covalent compound and thus does not ionise to give ions responsible for conducting the electric current.


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