Question

Which of the following is not a characteristic of a mixture?

• A. It has fixed melting and boiling points.
• B. It can be separated into its constituents by physical methods.
• C. It shows the properties of its constituents.
• D. The composition of a mixture is variable.

Answer 1

The correct option is A It has fixed melting and boiling points.

A mixture has the given characteristics-
The mixture has no fixed composition.
To form a mixture, energy is neither produced nor evolved.
The mixture has no fixed melting points and boiling points.
The mixture retains the properties of its components.
Components of mixtures can be separated by simple physical methods.
Hence, option (a) is not a characteristic of a mixture.