27) Why do not a wall immediately acquire a white colour on coating of slaked lime is applied on it ?
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Answer:
This is because Cakcium hydroxide's reaction with the Carbondioxide in the air is slow and it needs 2-3 days to form the layer of calcium carbonate. So as to give shiny white colour.
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Hope this helps you.
Explanation:
This is because Calcium hydroxide's reaction with the Carbondioxide in the air is slow and it needs 2-3 days to form the layer of calcium carbonate. So as to give shiny white colour.
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