Single Answer MCQ
Q-00002004
Explain the formation of slaked lime by the reaction of calcium oxide with water.
1
Slaked lime is formed by the reaction of calcium oxide with air.
2
Slaked lime is formed by the reaction of calcium oxide with water vapor.
3
Slaked lime is formed by the reaction of calcium oxide with water.
4
Slaked lime is formed by the reaction of calcium oxide with oxygen.
Answer and Solution
Answer
C. Slaked lime is formed by the reaction of calcium oxide with water.
Solution:
When calcium oxide (CaO) reacts with water (H2O), it forms calcium hydroxide (slaked lime, Ca(OH)2). This reaction is exothermic and produces heat. The chemical equation for this reaction is: CaO + H2O -> Ca(OH)2.
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