A house wife bought 10 kg of quick lime from market and dissolved it in 30 liytres of water she noticed that water started boiling even when it was not being heated.give reason for your observation
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The housewife noticed the water boiling because reaction between quick lime (CaO) and water is exothermic. The large amount of heat evolved made the water boiling.
Calcium oxide react vigorously with water to produce slaked lime(calcium hydroxide) releasing a large amount of heat.
CaO(s) + H O→Ca(OH) + heat
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