State the type of equation for the following reactions: (5) 1. 2 Pb3O4 → 6 PbO + O2 2. NH4OH + FeSO4 → ( NH4)2SO4 + Fe(OH)2 3. Zn + CuSO4 → Cu + ZnSO4 4. CaCO3 → CaO + CO2 5. 2Na + 2H2O → 2NaOH + H2
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a) 2HNO 3 +Ca(OH) 2→Ca(NO 3 )2+2H↓2O
(b) 2NaOH+H 2 SO 4 →Na 2 SO 4 +2H 2O
(c) NaCl+AgNO 3 →AgCl+NaNO 3
(d) BaCl 2 +H 2 SO 4 →BaSO 4 +2HCl
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