Which of the following is NOT a main type of chemical reaction?

The correct response identifies electrolysis as not being one of the main types of chemical reactions typically categorized in basic chemistry. The primary categories of chemical reactions include synthesis, decomposition, and combustion.

Synthesis reactions involve two or more reactants combining to form a new compound, which exemplifies how elements can come together to create new substances. Decomposition reactions, on the other hand, occur when a single compound breaks down into two or more simpler substances, illustrating the reverse process of synthesis.

Combustion reactions are characterized by the rapid reaction of a substance with oxygen, often producing heat and light, usually resulting in carbon dioxide and water from organic compounds.

While electrolysis is an important process used to induce chemical changes in substances, particularly in the context of breaking down compounds using electrical energy, it is not classified as one of the three main types of chemical reactions. The distinction lies in the fact that electrolysis is a specific technique or method rather than a generalized reaction type like the others listed.