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What is a solution?

  1. A pure substance

  2. A mixture of two or more substances

  3. A single element

  4. A chemical reaction

The correct answer is: A mixture of two or more substances

A A pure substance is a type of matter that is made up of only one type of particle. This means that it cannot be separated into other substances by physical means. Solutions, on the other hand, are mixtures of two or more substances and can be separated into their individual components. B: This is the correct answer. C: A single element is a pure substance and is not a solution. Solutions must contain at least two components. D: A chemical reaction is a process that involves the rearrangement of atoms to form new substances. While solutions may involve chemical reactions, they are not considered solutions in and of themselves.