(i) Mg burns with dazzling brilliance in air to form magnesium oxide.
2Mg + O2 \(\overset{\Delta}{\rightarrow}\) 2MgO
(ii) Quick lime is heated with silica to form calcium silicate.
CaO + SiO2 → CaSiO3
(iii) Chlorine is heated with slaked lime to form calcium hypochlorite, a constituent of bleaching powder.
2Ca(OH)2 + 2Cl2 → CaCl2 + Ca(OCl)2 + 2H2O
Bleaching powder