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When quicklime dissolves in water?

Chemistry
WAEC 2019

When quicklime dissolves in water?

  • A. heat is absorbed
  • B. heat is evolved
  • C. oxygen is liberated
  • D. hydrogen is given off
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Correct Answer: Option B
Explanation

- When quicklime is added to water, it forms slaked lime along with the evolution of heat. There will be a rise in the temperature of the bucket. Calcium oxide reacts with water to form calcium hydroxide, also called slaked lime.

- That is adding water to quicklime produces an exothermic reaction (gives out heat) and hydrated lime.


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