Chemistry Regents Practice Test 2026 – The All-in-One Guide to Exam Success!

Question: 1 / 400

What is the primary purpose of combustion reactions?

To produce acids and bases

To release energy in the form of light and heat

The primary purpose of combustion reactions is to release energy in the form of light and heat. During combustion, a substance (commonly a hydrocarbon) reacts with oxygen, resulting in the production of carbon dioxide and water along with the release of energy. This energy release is what powers engines, heats homes, and produces light in flames.

In contrast, the other options do not accurately represent the main characteristic of combustion reactions. The production of acids and bases, formation of salts, and creation of polymers are related to different types of chemical reactions and processes, not specifically to the combustion process. Thus, the energy release during combustion is the defining feature that underscores its primary purpose.

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To form salts from metal and non-metal reactions

To create polymers from monomers

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