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Question

In extractive metallurgy of zinc partial fusion of ZnO with coke is called ______ and reduction of the ore to the molten metal is called________ .

A
sintering, smelting
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B
roasting, smelting
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C
sintering, roasting
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D
none of these
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Solution

The correct option is A sintering, smelting
Sintering is the process of forming a solid mass of material by heat and/or pressure without melting it to the point of liquefaction. Sintering happens naturally in mineral deposits or as a manufacturing process used with metals, ceramics, plastics, and other materials.

Smeltings main use is to produce a metal from its ore. Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gasses or slag and leaving just the metal behind. The reducing agent is commonly a source of carbon.The carbon removes oxygen from the ore, leaving behind elemental metal.


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