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Question
The chemical reaction between quicklime and water is characterised by ______.
Options
evolution of hydrogen gas.
formation of slaked lime precipitate.
change in temperature of mixture.
change in colour of the product.
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Solution
The chemical reaction between quicklime and water is characterised by change in temperature of mixture.
Explanation:
When quicklime (calcium oxide, CaO) reacts vigorously with water (H2O), it forms slaked lime, calcium hydroxide (Ca(OH)2). This combination process is highly exothermic, meaning it releases a large amount of heat. As a result, the temperature of the reaction mixture rises sharply, often making the water boil and producing a distinct hissing sound.
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