If a substance reacts with oxygen, the chemical reaction is most likely a:

• A. decomposition reaction
• B. combustion reaction
• C. precipitation reaction
• D. neutralization reaction

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the types of chemical reactions listed. A decomposition reaction involves a single compound breaking down into two or more simpler substances.
2. Step 2: Recognize that a precipitation reaction involves the formation of an insoluble solid (precipitate) when two aqueous solutions are mixed.
3. Step 3: Know that a neutralization reaction occurs when an acid reacts with a base to produce water and a salt.
4. Step 4: Identify that a combustion reaction typically involves a substance reacting with oxygen, often producing heat and light, and forming oxides as products.
5. Step 5: Since the problem states the substance reacts with oxygen, conclude that the reaction is most likely a combustion reaction.