Question:
Solid Calcium oxide reacts vigorously with water to form Calcium hydroxide accompanied by the liberation of heat. From the information given above it may be concluded that this reaction
Solid Calcium oxide reacts vigorously with water to form Calcium hydroxide accompanied by the liberation of heat. From the information given above it may be concluded that this reaction
Updated On: Dec 11, 2024
- is endothermic and pH of the solution formed is more than 7.
- is exothermic and pH of the solution formed is 7.
- is endothermic and pH of the solution formed is 7.
- is exothermic and pH of the solution formed is more than 7.
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The Correct Option is D
Solution and Explanation
The reaction between calcium oxide (quicklime) and water is highly exothermic and produces calcium hydroxide (a strong base), which increases the solution’s pH:
\[\text{CaO (s)} + \text{H}_2\text{O (l)} \rightarrow \text{Ca(OH)}_2 \, + \, \text{heat}.\]
As calcium hydroxide is a base, the pH of the solution is greater than 7.
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