explain any two purification methods of metals
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Answer:
Calcination nad roasting
Explanation:
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2
Answer:
Calcination and Roasting
Explanation:
Calcination: The carbonate ore are changed into oxides by heating strongly in limited air. This process are called calcination.
ex-. ZnCO3. + Heat - ZnO + CO2
Roasting- The sulphur ores are converted into oxides by heating strongly in the presence of excess air. This process is called roasting.
Ex- ZnS + 3 O2 - 2ZnO + 2SO2
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