Question on: JAMB Chemistry - 2008

When a solution of ammonium trioxocarbonate (IV) is added to a solution of an unknown salt, a white precipitate which is soluble in dilute hydrochloric acid but insoluble in ethanoic acid is formed. This indicates the presence of

A
Ca2+
B
Na+
C
Zn2+
D
K+
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Correct Option: A

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