Which one of the following carbonate is water insoluble?
Correct answer: D. CaCO3
- A. Na2CO3
- B. K2CO3
- C. NaHCO3
- D. CaCO3
Explanation
Sodium and potassium carbonates readily dissolve in water due to their strong ionic bonds and high hydration energy.Sodium bicarbonate has moderate solubility because its bicarbonate ion (HCO3-) is slightly larger than the carbonate ion (CO3-2), making it less tightly bound to water molecules.Calcium carbonate is insoluble in water because its strong ionic bonds and low hydration energy make it difficult for water molecules to break apart its crystal lattice.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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