Question

question select the correct answer from each drop - down menu. complete these descriptions of different kinds of chemical reactions. a reaction involves burning. this reaction requires energy to start, but it releases more energy. oxygen is always a reactant, and the products are usually carbon dioxide and water. a reaction occurs when a compound breaks down. this reaction has one reactant and two or more products. energy, such as from a battery, is usually needed to break the compound apart. a reaction occurs when two substances combine to form one substance. an example of this is when iron reacts with oxygen. a reaction that involves the replacement of atoms is a reaction. an atom from one reactant replaces an atom in the other reactant. this kind of reaction has two reactants and two products. an example is the neutralization of an acid and an alkali. combustion decomposition replacement synthesis

Explanation:

Combustion reactions involve burning with oxygen as a reactant and produce carbon - dioxide and water usually. Decomposition reactions break a compound into simpler substances with one reactant and multiple products. Synthesis reactions combine two substances into one. Replacement reactions involve atom - replacement between two reactants with two reactants and two products.

Answer:

1. Combustion
2. Decomposition
3. Synthesis
4. Replacement