Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slakingof lime and the solution formed ? It is an endothermic reaction. (ii) It is an exothermic reaction. (iii) The pH of the resulting solution will be more than seven. (iv) The pH of the resulting solution will be less than seven.

Solid calcium oxide reacts vigorously with water to form calcium hydro

1.	Solid calcium oxide reacts vigorously with water to form calcium hydroxide accompanied by liberation of heat. This process is called slaking of lime. Calcium hydroxide dissolves in water to form its solution called lime water. Which among the following is (are) true about slakingof lime and the solution formed ? It is an endothermic reaction. (ii) It is an exothermic reaction. (iii) The pH of the resulting solution will be more than seven. (iv) The pH of the resulting solution will be less than seven.
Answer» (i) and (II) (ii) and (iii) (i) and (iv) (iii) and (iv) Solution :Heat is liberated when solid calcium OXIDE reacts with water. Calcium HYDROXIDE produced, being a base, has pH more than 7.