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  4. In the extractive metallurgy of zinc, partial fusion of ZnO with coke is called ....... and reduction of the ore to the molten metal is called ........ (smelting, calcining, roasting, sintering).

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Q. In the extractive metallurgy of zinc, partial fusion of $ZnO$ with coke is called ....... and reduction of the ore to the molten metal is called ........ (smelting, calcining, roasting, sintering).

IIT JEEIIT JEE 1988General Principles and Processes of Isolation of Elements

Solution:

$ZnO+C\xrightarrow[\text{sintering}]{\Delta} Zn+CO=$ smelting