Question

A mixture is a material system made up of two or more different substances which are mixed:
A.Chemically
B.physically
C.both a and b
D.none of these

Answer 1

If the material is made up of two or more different substances that type of material is known as mixture. And the substance is not combined with each other. For example, dirt and water and that mixture is known as mud. And here, the dirt will not dissolve in the water. Because, here the substance is not chemically combined.

Complete answer:
The mixture is prepared by the mixing of two or more substances. But the mixture is not mixed chemically. Hence, option (A) is incorrect.
A mixture is a material system made up of two or more different substances and that substance is physically mixed. Hence, that can easily separate into its original components by using several processes lie sublimation, evaporation, filtration, distillation etc.
And during the formation of a mixture, the energy is either absorbed or evolved. Hence, option (B) is correct.
In the case of a mixture, the substance is combined only physically and the substance is not combined chemically. Hence, option (C) is incorrect.
If two or more substances physically combine with each other, there is a formation of a mixture. Therefore, option (B) is true. Hence, the option (D) is incorrect.

Note:
We have to know that a mixture is prepared by using different substances which are physically combined and that mixture can be separated to its original components. But if two or more substances are combined chemically, then it cannot be separated into its original state. And the mixture is mainly divided into two types according to the type of substance present in a mixture and that is, homogeneous mixture and heterogeneous mixture.