Question

A chemical reaction which is both combination as well as exothermic, is used by us

for white washing purposes. Write the equation for the same.

Answer 1

Cao(s) + CO2(g)-->CaCO3(s)
calcium carbon calcium
oxide dioxide carbonate

Answer 2

Hey here is your answer
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the chemical equation is:-
CaO + H2O------>Ca(OH)2
when calcium oxide ( quick lime) reacts with water it forms calcium hydroxide ( slaked lime) and releases a large amount of heat. So, this reaction is combination as well as a exothermic reaction. And CaO is also used for whitewashing purposes.
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hope it helps
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