Question

State true or false
The melting and the boiling point of a mixture are fixed depending on the properties of the components it is made of.

Answer 1

Hint: A mixture contains different substances combined physically. There is no change in the chemical identity or the property of individual components of the mixture. In a mixture, the physical properties of the components are also different just like the chemical properties.

Complete answer:
 A mixture is a physical combination of two or more substances where the identities of the individual substances are retained. They are not combined chemically. The original properties of every component in the mixture are not lost. Their separation is easily possible. Mixtures can be homogeneous as well as heterogeneous. In a homogenous mixture, the composition of the substances is uniform throughout. Example-soft drink water, sugar and water mixture, air, salt and water mixture, etc. homogeneous mixtures cannot be separated easily. And their particle size is also less than one nanometer. In a heterogeneous mixture, the substances are not uniform. Examples-oil and water, Sulphur and iron filings, etc. they can be separated easily. The particle size ranges from one nanometer to one micrometer.
Mixtures are defined as substances that are made up of two or more pure substances. The mixture doesn’t have a sharp melting and boiling point. Every component or substance present in a mixture has its own chemical identity.
Therefore from the above statements, we can say that the melting and the boiling point of a mixture are not fixed. Hence the statement is false.

Note:
Mixtures can be classified into a colloid, suspension, and solution based upon the size of their particle. If the particle size is very small, less than one nanometer, then the mixture is a solution. If the particle size is between one nanometer and one micrometer then it is a colloid mixture, and if the particle size of the mixture is more than one micrometer then it is a suspension.