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Question

The chemical reaction between quicklime and water is characterised by :
(a) evolution of hydrogen gas

(b) formation of slaked lime precipitate

(c) change in temperature of mixture

(d) change in colour of the product


Solution

(c) change in temperature of mixture

Quicklime is treated with water- The chemical reaction between quicklime and water to form slaked lime(Ca(OH)2) is characterized by a change in temperature. There is a rise in temperature as it is an exothermic reaction.

CaO(s)+H2O(l)Ca(OH)2(s)

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