1.

The reaction that does NOT define calcination is :(1)  2Cu2S  + 3O2 + Δ →2Cu2O + 2SO2(2)  ZnCO3 + Δ → ZnO + CO2 (3)  Fe2O3 . XH2O + Δ → Fe2O3 +  XH2O(4)  CaCO3 .  MgCO3 + Δ → CaO + MgO + 2CO2 

Answer»

Correct option (1)  2Cu2S  + 3O2 + Δ 2Cu2O + 2SO2

Explanation:

(2Cu2S  + 3O2 + Δ 2Cu2O + 2SO2  is roasting process as Cu2S is sulphide ore.



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