Question

Which one of the statements below about mixtures is correct?

[1] The different substances in a mixture are always in a definite proportion to each other. [2] A mixture is made up of elements that are chemically combined.

[3] A mixture must contain at least two different substances.

[4] It is extremely difficult to separate a mixture into different substances.

[5] A mixture is always homogeneous

Answer 1

[3] A mixture must contain at least two different substances