Which of the following is a precipitation reaction?
Lagos State University CHM101 2024 past question
- AgNO₃ + NaCl → AgCl + NaNO₃
- FeS + O₂ → Fe₂O₃ + SO₂
- Na₂O + CO₂ → Na₂CO₃
- CaO + 2HCl → CaCl₂ + H₂O
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