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Question
What happens when nitric acid is added to egg shell?
Answer in Brief
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Solution
Egg shell contains calcium carbonate as its main constituent. When dipped in concentrated nitric acid, calcium carbonate reacts to evolve carbon dioxide. As a result, egg shell slowly dissolves.
`"CaCO"_3 + 2"HNO"_3 ("Conc".) -> "Ca"("NO"_3)_2 + "H"_2"O" + "CO"_2`
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