Combination reaction types:1. Reaction between two elementsEx: C + O2`->` CO2Here the carbon is completely burnt in oxygen which results in carbon dioxide 2. Reaction between two compoundsEx: CaO + H2O `->` Ca ( OH)2Here the CALCIUM oxide (lime) combined with WATER gives calcium hydroxide which also known as slaked lime.3. Reaction between an element and compoundEx: O + H2O `->` H2O2Here oxygen which is an element combined with water which is a compound gives hydrogen peroxide.Examples for combination reaction:1. Na2 + H2O `->` 2NaOHHere sodium oxide is combined with water gives sodium hydroxide.2. 4Li + O2 `->` 2Li2OHere lithium is combined with oxygen to form lithium oxide.3. 2Mg + O2 `->` 2 MgOHere magnesium is combined with oxygen to form magnesium oxide.4. H2 + Cl2 `->` 2 HCLHere hydrogen is combined with chlorine to form hydrochloride.5. NH3 + HCL `->` NH4ClHere colorless ammonia is added to colorless hydrogen chloride gives ammonia chloride.6. 2H2 + O2 `->` 2 H2OHere hydrogen is burned in the air or oxygen produces water.7. S + O2 `->` SO2Here sulphur is burned in the air to produce sulphur dioxide.8. Ba + F2 `->` Ba F2Here barium metal and fluorine gas is combined to produce salt barium fluoride which is highly exothermic reaction.9. MgO + CO2 `->` MgCO3Here magnesium oxide is combined with carbon to produce magnesium carbon dioxide.10. 2Al + 3Br `->` 2AlBr3Here aluminum is combined with bromine which produces 3 + aluminum iron and 1+bromine iron.Forthcoming post is on the topic Reaction Rate Equation keep reading my blogs.Other Reactions:Chemical reactions are of the following six types:1)Combustion reaction: It is a type of reaction in which oxygen combines with the other compound and forms carbon dioxide (CO2) and water (H20)Ex: C10H8 + 12 O2 -----------> 10 CO2 + 4 H2O CH4 + 2 O2 ---------------> CO2 + 2 H2O2)Synthesis Reaction: It is a type of chemical reaction in which two or more simple substances combine to form one single complex substance.Ex: C + O2 ----------> CO2 CaO + H2O -----------> Ca(OH)23) Decomposition Reaction: It is a type of chemical reaction in which a complex substance breaks down to simpler substances.It is opposite of synthesis reaction.Ex: 2 N2O5 ----------> 4 NO2 + H20 2 KClO3 -------------> 2 KCl + 3 O24) Single displacement reaction : It is a chemical reaction in which an element displaces another element in a compound . Ex: Mg + 2 HCl -----------> MgCl2 +H2 Fe2O3 + Zn ------------> Zn2O3 + 2 Fe 5) Double displacement reaction:This is a type of chemical reaction in which the anions and cations in the reactants interchange their positions and form two different compounds.Ex: 2 NaCl +H2SO4 -------------> Na2SO4 + 2 HCl AgNO3 + KCl ---------------> AgCl + KNO36) Acid - Base reaction: It is a type of double displacement reaction in which acid and base react to form salt and water.Ex: HCl + NaOH -------------> NaCl + H20 H2SO4 + 2 NaOH ----------> Na2SO4 + 2 H2O7) Isomerisation : It a type of chemical reaction in which a chemical compound undergoes a structural rearrangement without any change in its net atomic composition.8) Disproportionation : Its a type of chemical reaction in which a single reactant forms two products with different oxidation states.Ex: Pb+2 ------------> Pb + Pb +4. here in the products lead has 0 and +4 oxidation states.