MetallurgyMedium

Question

Which one of the following reactions represents a calcination reaction?

Options

A.HgS + O2 →  Hg + SO2
B.AgNO3 + NaCl → AgCl + NaNO3
C.CuCO3. Cu(OH)2 → CuO + CO2 + H2O
D.Al2O3 + NaOH → NaAlO2 + H2O

Solution

(C) Carbonate ores are calcined in absence of air to obtain the metal oxides.

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