(D) From the list of terms given, choose the most
appropriate term to match the given description
(liquation, froth floatation, roasting, flex).i repairing metal with low melting point.
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Pulverisation refers to crushing of the ore into a fine powder. Thus, pulvurised ore is powdered ore.
2. Calcination, refers to heating of the ore in the absence of air (or in a limited supply of air) to a high temperature (below the melting point of the ore). During calcination, organic matter, moisture, volatile impurities like carbon dioxide and sulphurdioxide are expelled from the ore. It makes ore porous.
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