Answers

2016-05-04T15:02:54+05:30
CaCO3 ( egg shell) + HNO3 ( nitric acid) ----> Ca(NO3)(calcium nitrate) + CO2 ( carbon dioxide ) + H2O
Egg shells contain calcium carbonate (CaCO ). When nitric acid is added to it, brisk effervescence due to the formation of CO2.
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