The reaction that does NOT define calcination is :

Options

A. `CaCO_(3)MgCO_(3) overset(Delta)toCaO + MgO + 2CO_(2)`
B. `2Cu_(2)S + 3O_(2) overset(Delta)to 2Cu_(2)O + 2SO_(2)`
C. `Fe_(2)O_(3).XH_(2)O overset(Delta)to Fe_(2)O_(3) + XH_(2)O`
D. `ZnCO_(3) overset(Delta)to ZnO + CO_(2)`

Answer

B

Explanation

Calcination in carried out for carbonates and oxide ores in absence of oxygen. Roasting is carried out mainly for sulphide ores in presence of excess of oxygen.