Which pair of aqueous solutions will produce a precipitate when mixed?

NaCl and KNO₃
AgNO₃ and KI
NaOH and HCl
CuSO₄ and Mg(NO₃)₂

📝 Detailed explanation

According to solubility rules, AgI is insoluble in water and will form a yellow precipitate. The other pairs result in soluble products or simple neutralization.

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