Question

(a) Define pure substance.

(b) State characteristics of pure substance.

Answer 1

(a)

1. Pure substances are those substances that are made up of only one kind of particle (atoms or molecules).
2. Pure substances are either an element or a compound.
3. For example - Gold, Silver, Water, Carbon dioxide, etc.

(b) Some characteristics of pure substances are as follows -

1. They are homogeneous in nature.
2. A pure material possesses a set of characteristics.
3. A pure substance's composition cannot be changed by physical processes.