Coke and Flux are used in smelting. Why?
Example: Flux used in copper smelting is Silica (SiO2), Silica powder (Si), Lime-water(Ca(OH)2)
FeO(s)+SiO2(s)→FeSiO3(s)
Explain the following terms:
(a) flux, (b)gangue,
(c) slag, (d) smelting.