Question

the chemical reaction between quicklime and water is characterised by

Answer 1

changing of temperature

Answer 2

Quicklime when added to water, it reacts with water chemically and form a suspension of slaked lime in water and produce heat energy. So it also results in an increase in temperature of the mixture.
CaO+H2O→Ca(OH)2+Heat


Simply we can say that evolution of gas makes us conform
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Hope it may help you