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A piece of sea shell, when dropped into a dilute solution of hydrochloric acid, ...

A piece of sea shell, when dropped into a dilute solution of hydrochloric acid, produces a colourless, odourless gas which turns clear limewater milky. The sea shell contains

A. sodium chloride
B. ammonium nitrate
C. calcium carbonate
D. calcium chloride
E. magnesium chloride




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