Question

Define Exacting and refining of metals
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Answer 1

Explanation:

Exacting of metals :

ores found in the form of sulphide and carbonates are first converted to their oxides by the process of roasting and calcination. Oxides of metals so obtained are converted into metals by the process of reduction.

Refining of metals :

The process of purifying impure metal is called refining of metal. The most important and most widely used method for refining impure metals is called electrolytic refining. Many metals like copper, zinc, tin, lead, nickel, silver, gold are refined electrolytically.