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Strongly heating a carbonate ore in a limited supply of air to convert it into the oxide is called what?
AElectroplating
BRoasting
CGalvanizing
DCalcination
Answer & Solution
Correct answer: D. Calcination
1. Carbonate ores are converted to oxides before reduction.
2. Heating a carbonate ore strongly in a limited supply of air is called calcination.
3. For example, ZnCO3 gives ZnO + CO2.
4. Roasting uses excess air on sulphides, so it does not match a carbonate ore.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 8 "Metallurgy", p.113_
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