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Which of the following properties of NaHCO3 and KHCO3 is INCORRECT?
- Both are fairly soluble in water
- Both have similar hydrogen-bonded polymeric structure of HCO3- ion in their solids
- Both solids consist of ion-dipole type of interactions
- Both produce their respective carbonate salts as residue on heating
Correct answer: Both solids consist of ion-dipole type of interactions
Solution
In the solid state, NaHCO3 and KHCO3 are ionic crystals where Na+/K+ cations and HCO3- anions are held by ionic (electrostatic) bonds. Ion-dipole forces occur in solution between ions and solvent molecules, not within ionic solid lattices. Options A, B, and D are all factually correct.
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