Slaking of lime: \(CaO + H_2O → Ca(OH)_2 + \text{heat}\). Which is/are true?
(i) Endothermic reaction
(ii) Exothermic reaction
(iii) pH of solution > 7
(iv) pH of solution < 7
(i) and (ii)
(ii) and (iii)
(i) and (iv)
(iii) and (iv)
Heat is evolved (exothermic) and lime water is basic → pH > 7.