A chemical reaction which is both combination as well as enothermic,is used by us for white washing
purposes.write the equation for the same.
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CaO+ H²O -> CaCO³ + H²
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✓✓✓✓✓✓✓✓Calcium oxide ( Quick lime) reacts with water to form Calcium Hydroxide and lot of heat .
As two two elements are reacting to produce only one product. This type of reaction is called as Chemical combination reaction.
During the chemical reaction, lot of heat is produced . Hence it is exothermic reaction.
BALANCED CHEMICAL Equation:
CaO (s) + H2O(l) ----> Ca (OH)2(aq) +Q
Here, calcium hdroxide (Slaked lime) is generally used for white washing.
After 2 or 3 days of white wash , the wall will get shine and white colour due to the following reaction:
Ca (OH)2 + CO2----> CaCO3(s) + H2O
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