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Question

Which one of the following compounds is insoluble in water? A) Na2CO3 B) K2SO4 C) Fe(NO3)3 D) ZnS E) AgNO3

Answer

D) ZnS is insoluble. Explanation: The water solubility of ZnS is extremely low, making it unable to dissolve in water. Therefore, it can be classified as insoluble.