What is a mixture?

What is a mixture?

• A. A single substance with fixed composition.
• B. A combination of two or more substances physically blended but not chemically combined.
• C. A substance that cannot be separated.
• D. A pure element.

Answer: (B)

A mixture happens when two or more substances are combined physically, without forming new chemical bonds. In a mixture, each substance keeps its own properties, and their parts can be present in any proportion. Because they’re not chemically bonded, you can usually separate them by physical methods, like filtration, evaporation, or magnetism. This matches the idea that a mixture is a combination of two or more substances physically blended but not chemically combined, which is why that choice is correct. The other options describe substances that are not mixtures: a pure substance with a fixed composition, something that cannot be separated, or a pure element.

A mixture happens when two or more substances are combined physically, without forming new chemical bonds. In a mixture, each substance keeps its own properties, and their parts can be present in any proportion. Because they’re not chemically bonded, you can usually separate them by physical methods, like filtration, evaporation, or magnetism.

This matches the idea that a mixture is a combination of two or more substances physically blended but not chemically combined, which is why that choice is correct. The other options describe substances that are not mixtures: a pure substance with a fixed composition, something that cannot be separated, or a pure element.