Chemistry
Grade-8
Easy
Question
When water is added to calcium oxide solution, calcium hydroxide is obtained as product of this reaction.
Identify the correct statement regarding the above experiment:
- This Chemical reaction proceed with formation of precipitate of slaked lime
- The large amount of heat is generated in this reaction
- The calcium hydroxide is obtained during this reaction is highly unstable
- To accelerate the given chemical reaction, a catalyst is required
Hint:
The solution feels warm when it undergoes a reaction
The correct answer is: The large amount of heat is generated in this reaction
- When calcium oxide (commonly known as quicklime) reacts with water, it combines with water to form calcium hydroxide (commonly known as slaked lime).
- The product of this reaction is calcium hydroxide, also called slaked lime. This reaction is an example of a compound reaction.
- Formation of slaked lime (calcium hydroxide); adding water to lime (CaO) produces heat. This reaction occurs when water is added to dry Portland cement to make concrete, and the mixture warms up, demonstrating the release of energy as heat.
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