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  1. Slag is a name given for
    1. molten iron
    2. molten sand
    3. molten alumina
    4. molten calcium silicate
Correct Option: C

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.



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