What does it mean if a substance dissolves in a solution?

• A. It always indicates a chemical reaction has occurred.
• B. It may not indicate a chemical reaction has occurred.
• C. It means a precipitate is formed.
• D. It changes the substance into a different substance.

Answer: (B)

Dissolving means a substance spreads out in a solvent to form a uniform mixture without necessarily undergoing a chemical change. It’s a physical process where the solute particles are separated and surrounded by solvent molecules, but the substance’s identity isn’t changed by dissolution itself. That’s why dissolving may not indicate a chemical reaction has occurred. For example, sugar dissolves in water without forming new chemicals. The other ideas describe outcomes that either assume a reaction happens, produce a precipitate, or imply a chemical transformation—none of which are required just by dissolving.