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प्रश्न
What happens when nitric acid is added to egg shell?
उत्तर
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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