A mixture is defined as

A mixture is defined as

• A. A combination of two or more substances that are not chemically combined
• B. A pure substance
• C. A single element
• D. A chemical compound

Answer: (A)

Mixtures are made of two or more substances that do not form new chemical bonds with each other, so each component keeps its own properties and identity. Because there are no chemical bonds holding the parts together, mixtures can be separated into their components by physical methods such as filtration, evaporation, or distillation, and the proportions of components can vary from one sample to another. This is what sets mixtures apart from pure substances, which have a fixed composition and cannot be split into simpler substances by physical means. A pure substance can be an element, or a compound, which is a chemical combination of elements in fixed ratios bonded together. Therefore, describing a mixture as a combination of two or more substances that are not chemically combined best captures the idea.

Mixtures are made of two or more substances that do not form new chemical bonds with each other, so each component keeps its own properties and identity. Because there are no chemical bonds holding the parts together, mixtures can be separated into their components by physical methods such as filtration, evaporation, or distillation, and the proportions of components can vary from one sample to another. This is what sets mixtures apart from pure substances, which have a fixed composition and cannot be split into simpler substances by physical means. A pure substance can be an element, or a compound, which is a chemical combination of elements in fixed ratios bonded together. Therefore, describing a mixture as a combination of two or more substances that are not chemically combined best captures the idea.