ChemistryMedium99×since 2002Q1363Which one of the following is not an example of calcination?ACaCO3⋅MgCO3⟶ΔCaO+MgO+2CO2\mathrm{CaCO}_{3} \cdot \mathrm{MgCO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{MgO}+2 \mathrm{CO}_{2}CaCO3⋅MgCO3⟶ΔCaO+MgO+2CO2B2PbS+3O2⟶Δ2PbO+2SO22 \mathrm{PbS}+3 \mathrm{O}_{2} \stackrel{\Delta}{\longrightarrow} 2 \mathrm{PbO}+2 \mathrm{SO}_{2}2PbS+3O2⟶Δ2PbO+2SO2CCaCO3⟶ΔCaO+CO2\mathrm{CaCO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_{2}CaCO3⟶ΔCaO+CO2DFe2O3⋅xH2O⟶ΔFe2O3+xH2O\mathrm{Fe}_{2} \mathrm{O}_{3} \cdot \mathrm{xH}_{2} \mathrm{O} \stackrel{\Delta}{\longrightarrow} \mathrm{Fe}_{2} \mathrm{O}_{3}+\mathrm{xH}_{2} \mathrm{O}Fe2O3⋅xH2O⟶ΔFe2O3+xH2OCheck answerSkip