Respuesta :
The correct answer for this question is Ca(0H)2
The compound ca(OH)2 being an ionic compound having hydrogen bonds are easy to break due to this the more dissociation takes place and the presence of hydrogen ions increases the dissolution of calcium hydroxide hence increases solubility of ca(OH)2 in acidic solution and the solubility product i.e., Ksp for Ca(OH)2 is 6.5 x10-6 at 25°C.
And the presence of hydrogen ions increases the solubility of calcium hydroxide in acidic solution while the caco3 also being ionic compound but has less solubility in acids than ca(OH)2 and the AgI being covalent compound has low solubility than the rest of the compounds.
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