Question

White wash was being done at Mukesh’s house. Mukesh saw that the painter added quick lime to drum having water. Mukesh touched outer surface of drum, it is unbelievably hot.(a) Write the chemical equation for above reaction.(b) What type of reaction is it ?(c) What is the utility of this reation

Answer 1

a) Cao+ H20 = Ca(OH)2 + heat .

b) combination reaction

3)used in white washing it is a base , it is used as a labrotary chemical .


it is STRONG alkali .

it is a type of exothermic reaction in which heat is released.

hope it helps!!!

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Answer 2

Formula of quick lime = Cao..

a) Cao + H2O -----------> Ca(OH)2 + Heat

b) As a lot of heat was evolved its an exothermic reaction.. But also as only one product is obtained its combination reaction..

c) This solution is mixed with carbon dioxide (CO2) to obtain CaCO3 which is a insoluble white precipitate which is used in white washing and also for carbon dioxide test..

Formula -

Ca(OH) 2 + CO2 ------------>

CaCO3 +H2O...

Hope it helps..
Thanks