1. Iron + Sulfur → Iron sulfide [Fe + S → FeS] is an example of   double decomposition reaction   simple displacement reaction   synthesis or direct combination reaction   decomposition reaction   Hint Half-n-half Clue   2. Potassium chloride + Silver nitrate → Potassium nitrate + Silver chloride [KCl + AgNO3 → KNO3 + AgCl] is an example of   synthesis or direct combination reaction   decomposition reaction   simple displacement reaction   double decomposition reaction   Half-n-half Clue   3. Calcium chloride + Sodium carbonate → Calcium carbonate + Sodium chloride [CaCl2 + Na2CO3 → CaCO3 + 2 NaCl] is an example of   decomposition reaction   simple displacement reaction   synthesis or direct combination reaction   double decomposition reaction   Half-n-half Clue   4. Water (+ electric current) → Hydrogen + Oxygen [2 H2O → 2 H2 + O2] is an example of   synthesis or direct combination reaction   simple displacement reaction   decomposition reaction   double decomposition reaction   Half-n-half Clue   5. Copper carbonate (+ heat) → Copper oxide + Carbon dioxide [CuCO3 → CuO + CO2] is an example of   synthesis or direct combination reaction   double decomposition reaction   simple displacement reaction   decomposition reaction   Half-n-half Clue   6. Magnesium + Oxygen → Magnesium oxide [2 Mg + O2 → 2 MgO] is an example of   synthesis or direct combination reaction   double decomposition reaction   decomposition reaction   simple displacement reaction   Half-n-half Clue   7. Sodium oxide + Water → Sodium hydroxide [Na2O + H2O → 2 NaOH] is an example of   double decomposition reaction   decomposition reaction   simple displacement reaction   synthesis or direct combination reaction   Half-n-half Clue