Question

ii) In which reaction cao react with water and form. Ca(OH)2.

a) Exothermic b) Endothermic

c) Combination d) Oxidation​

Answer 1

Answer:

In exothermic reaction

Answer 2

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The formation of slaked lime (calcium hydroxide, Ca(OH)2) when water is added to lime (CaO) is exothermic. CaO(s) + H2O (l) → Ca(OH)2(s) This reaction occurs when water is added to dry portland cement to make concrete, and heat evolution of energy as heat is evident because the mixture becomes warm.