Which of the following is a precipitation reaction? 1. Zn (s) + 2 AgNO3 (aq) → 2 Ag (s) + Zn(NO3)2 (aq) 2. NaCl (aq) + Lil (aq) → Nal (aq) + LiCl (aq) 3. 2 KI (aq) + Hg2(NO3)2 (aq) → Hg2l2 (s) + 2 KNO3(aq) 4. HBr (aq) + NaOH (aq) → NaBr (aq) + H2O (I 02 3 01 04
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