What is the chemical formula of Quick lime?

Ca(OH)2 CaO CaCO3 CaSO4.2H2O

CaO

The correct answer is option 2. \(CaO\). Calcium oxide (Quick lime) reacts vigorously with water to produce slaked lime (calcium hydroxide) releasing a large amount of heat. CaO(s)  +  H2O(l)  →  Ca(OH)2 (aq) + Heat (Quick lime)            (slaked lime) CaCO3 is limestone CaSO4.2H2O is Gypsum