Question

Classify the following as homogenous or heterogenous mixtures:

(a) Sugar solution (b) Milk ( c) Blood (d) iron-sulphur

Answer 1

1. Homogeneous mixtures: A mixture is said to be homogeneous if it has the same composition throughout the sample.
2. Heterogeneous mixtures: It is a mixture whose composition is not uniform throughout the sample and the constituents can be separated easily.
3. Sugar solution: It is a homogeneous solution as it has a uniform composition throughout.
4. Milk: It is a heterogeneous mixture as it has fat dispersed in water non-uniformly.
5. Blood: It is a heterogeneous mixture as it has a non-uniform composition of cells in plasma.
6. Iron-sulfur: It is a heterogeneous mixture as the composition in the entire sample is not uniform and they can be easily separated.

Therefore, (a) is a homogeneous mixture while (b), ( c) and (d) are examples of a heterogeneous mixture.