1.

Statement-1:Silica is added as a flux in reverberatory furnace, in the extraction of copper from copper pyrites. Statement-2:Silica acts as basic flux.

Answer»

Statement-1 is TRUE, Statement-2 is True, Statement-2 is a CORRECT explanation for Statement-1
Statement-1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1
Statement-1 is True, Statement-2 is False.
Statement-1 is False, Statement-2 is True.

Solution :`S_1:2CuFeS_2+O_2toCu_2S+2FeS+SO_2`,
`2FeS+3O_2 to 2FeO +2SO_2`
`FeO+SiO_2 to FeSiO_3`, thus remove the basic impurity of IRON oxide.
`S_2`:Silica acts as an ACIDIC FLUX.


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