Question

Explain homogeneous and heterogeneous mixture and give two examples of each.

GSEB - Class 9 Chapter - 4.Properties of Matter Page 59

Answer 1

The terms h​eterogeneous and homogeneous refer to mixtures of materials in chemistry. The difference between heterogeneous and homogeneous mixtures is the degree at which the materials are mixed together and the uniformity of their composition.

A homogeneous mixture is a mixture where the components that make up the mixture are uniformly distributed throughout the mixture. The composition of the mixture is the same throughout.

There is only one phase of matter observed in a homogeneous mixture.

HOMOGENEOUS MIXTURE EXAMPLESAirSugar waterRain waterVodkaVinegarDishwashing detergentSteel

You can't pick out components of a homogeneous mixture or use a simple mechanical means to separate them. You can't see individual chemicals or ingredients in this type of mixture. Only one phase of matter is present in a homogeneous mixture.

A heterogeneous mixture is a mixture where the components of the mixture are not uniform or have localized regions with different properties. Different samples from the mixture are not identical to each other. There are always two or more phases in a heterogeneous mixture, where you can identify a region with properties that are distinct from those of another region, even if they are the same state of matter (e.g., liquid, solid).

HETEROGENEOUS MIXTURE EXAMPLESCereal in milkVegetable soupPizzaBloodGravelIce in sodaSalad dressingMixed nutsBowl of colored candiesSoil

Answer 2

A homogenous mixture is one in which the particles are evenly distributed.

Eg. NaCl in water
CuSO4 in water


A heterogenous mixture is one in which the particles are spread unevenly

Eg. Sand and NaCl
Water and Oil