Metallurgy is the process of extraction of metal from their ores In which of the following processes...........

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Metallurgy is the process of extraction of metal from their ores. In which of the following processes heat and a chemical reducing agent is used to change the oxidation state of the metal ore

Smelting

Roasting

Calcination

Froth flotation

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Explanation:

Metallurgy is the process of extraction of metal from their ores. In smelting processes heat and a chemical reducing agent is used to change the oxidation state of the metal ore.