A combination reaction is a reaction where TWO reactants are combined into one product. A combination reaction is also known as a synthesis reaction. The reaction has the following GENERAL form: X + Y → XYExplanation:A decomposition reaction is a type of chemical reactionin which one reactantyields two or more products. The general form for a decomposition reaction is: AB → A + B Decomposition reactions are also known as analysis reactions or chemical breakdowns..Displacement reaction.A displacement reaction is a type of reaction in which part of one reactant is replaced by another reactant. A displacement reaction is also known as a replacement reaction or a metathesis reaction. There are two types of displacement reactions. Single displacement reactions are reactions where one reactant replaces part of the other:A neutralization reaction can be defined as a chemical reaction in which an acid and base quantitatively react TOGETHER to form a SALT and water as products. In a neutralization reaction, there is a combination of H + ions and OH – ions which form water. A neutralisation reaction is generally an acid-base neutralization reaction.ithink its HELP you like it