Question

Which one of the following reactions represents a calcination reaction?

• A. HgS + O2 Hg + SO2
• B. AgNO3 + NaClAgCl + NaNO3
• C. CuCO3 .Cu(OH)2CuO + CO2 + H2O
• D. Al2O3 + NaOHNaAlO2 + H2O

Answer 1

Answer: (C)

CuCO3 .Cu(OH)2CuO + CO2 + H2O

Answer 2

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