Which of the following is incorrect about the carbonates of alkaline earth metals ?A. They are insoluble in water.B. They are obtained as white precipitates when calculated amount of `CO_(2)` is passed through the solution of group 2 hydroxides.C. They are precipitated when sodium or ammonium carbonate solution is added to an aqueous solution of water soluble salt of group 2 elements.D. All the carbonates are ionic.

Which of the following is incorrect about the carbonates of alkaline e

1.	Which of the following is incorrect about the carbonates of alkaline earth metals ?A. They are insoluble in water.B. They are obtained as white precipitates when calculated amount of `CO_(2)` is passed through the solution of group 2 hydroxides.C. They are precipitated when sodium or ammonium carbonate solution is added to an aqueous solution of water soluble salt of group 2 elements.D. All the carbonates are ionic.
Answer» Correct Answer - D All the carbonates are ionic, but `BeCO_(3)` is unusual because it contains the hydrated `[Be(H_(2)O)_(4)]^(2+)` rather than `Be^(2+)` (2) `M(OH)_(2)(aq.)+CO_(2)(g)toMCO_(3)(s)+H_(2)O(l)` (3) `CaCl_(2)(aq.)+Na_(2)CO_(3)(aq.)toCaCO_(3)(s)+2NaCl(aq.)` Bryllium carbonate is prone to hydrolysis as it contains the hydrated ion `[Be(H_(2)O)_(4)]^(2+)` rather than `Be^(2+)` hence it can be precipitated only in an atmosphere of `CO_(2)`. `BeCO_(3)+4H_(2)Ounderset("Presence of "CO_(2))overset("Absence of "CO_(2))hArr[Be(H_(2)O)_(4)]^(2+)+CO_(3)^(2-)`

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