12. Slag is a name given for A.Molten iron B.Molten sand C.Molten alumina D.Molten calcium silicate
Answer: Option C Solution: Slag is a partially vitreous by-product of the process of smelting ore, which separates the desired metal fraction from the unwanted fraction. A good example is steelmaking slag: quicklime and magnesite are introduced for refractory protection, neutralizing the alumina and silica separated from the metal, and assist in the removal of sulfur and phosphorus from the steel.
