Question

what is meant by the pure substance

Answer 1

Hey mate!!!

Scientifically, pure substance means substances that are made up of same elements. Which means that they are not made up of different elements joint together.

For ex, water is mixture because it is made of Hydrogen + Oxygen gas. H2O
Where as oxygen gas is pure because it is made of 2 same atoms that is O2

Hope it helps dear friend ☺️✌️✌️

Answer 2

Answer:

A pure substance is one which is made up of only one kind of particles. These particles may be atoms or molecules. For example, sulphur is made up of only one kind of particles (called sulphur atoms), therefore, sulphur is a pure substance. Similarly, water is made up of only one kind of particles (called water molecules), therefore, water is also a pure substance. In fact, all the elements and compounds are pure substances because they contain only one kind of particles. A pure substance is homogeneous throughout its mass. A pure substance cannot be separated into other kinds of matter by any physical process. A pure substance has a fixed composition as well as a fixed melting point and boiling point.