The slaking of lime is an endothermic change.

True

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False

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Solution

The correct option is B False
Heat is evolved in the reaction when calcium oxide reacts with water and the water becomes very hot. Slaked lime (calcium hydroxide) is formed in the process.
The reaction is as follows:
$CaO + H_{2} O \to Ca {(OH)}_{2} + heat$
In this reaction, heat is released therefore this reaction is an exothermic reaction.
Therefore, the slaking of lime is not an endothermic change.
Hence, the given statement is false.

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Question 9

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 slaking of lime and the solution formed?

(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)

Q. Slaking of lime is
(i) an endothermic reaction
(ii) an exothermic reaction
(iii) a combination reaction
(iv) a decomposition reaction

Slaking of lime is which change

Q. In slaking of lime Is there any change in temperature

Q. 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

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