Question

Solid calcium oxide reacts vigorously with water to form calcium
hydroxide accompanied by liberation of heat. This process is called
slaking of lime. Which among the following is (are) true about
slaking of lime?
(i) 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
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (iii) and (iv)

Answer 1

Answer:

c)(1) and (4)

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Answer 2

Answer:

Explanation: (c) (i) and (iv) is the correct answer.

Because when we Calcium oxide in water it release High amount of Heat.

And the slake is a basic substance. Calcium Hydroxide (Ca(OH)2) or slaked lime is a base because in aqueous solution of slaked lime there are hydroxide ions available due to the dissociation of electrolyte (Ca(OH)2).