Which of the following best describes a solution?

• A. A compound formed by a chemical reaction between elements
• B. A heterogeneous mixture with visibly distinct phases
• C. A homogeneous mixture of two or more substances
• D. A pure substance composed of only one type of atom

Answer: (C)

Verified step by step guidance

1. Understand the definition of a solution in chemistry: it is a homogeneous mixture where the composition is uniform throughout.
2. Recall that a compound formed by a chemical reaction is a pure substance with a fixed composition, not a mixture.
3. Recognize that a heterogeneous mixture has visibly distinct phases, meaning it is not uniform throughout, so it cannot be a solution.
4. Note that a pure substance composed of only one type of atom is an element, not a mixture or solution.
5. Conclude that the best description of a solution is a homogeneous mixture of two or more substances, where the components are evenly distributed at the molecular level.