EVERYDAY SCIENCE

Detailed explanation-1: -A pure substance is a single kind of matter that cannot be separated into other kinds of matter by any physical means. A pure substance always has a definite and constant composition. A mixture is a physical combination of two or more pure substances in which each substance retains its own chemical identity.

Detailed explanation-2: -A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds.

Detailed explanation-3: -Mixture Have variable composition and can be separated into component parts by physical methods. Mixtures contain more than one kind of molecule, and their properties depend on the relative amount of each component present in the mixture.

Detailed explanation-4: -A mixture is said to be a homogeneous mixture if it has the same composition throughout the sample. A homogeneous mixture has no visible boundaries of separation between various constituents. For example, salt solution (sodium chloride is dissolved in water), sugar solution (sugar dissolved in water)

Detailed explanation-5: -In chemistry: a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.