NCERT Exemplar Solutions
Class 10 - Science - CHAPTER 1: Chemical Reactions and Equations - Multiple Choice QuestionsQuestion 9
Class 10 - Science - CHAPTER 1: Chemical Reactions and Equations - Multiple Choice Questions
Question. 9
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
(a)
(i) and (ii)
(b)
(ii) and (iii)
(c)
(i) and (iv)
(d)
(iii) and (iv)
Detailed Answer with Explanation:
Heat is evolved (exothermic) and lime water is basic → pH > 7.