Question

Define the following:-
1. Pure substance
2. Element
3. Compound
3. Mixture
​

Answer 1

1. Pure substances are defined as substances that are made of only one type of atom or molecule.

2. Each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.

3. A thing that is composed of two or more separate elements; a mixture.

4. A substance made by mixing other substances together.

HOPE I HELPED :)

Answer 2

Answer:

pure substance:It is a material containing particles of only one kind having a definite set of properties.

Mixture:It is a material obtained by mining two or more substance in any ration without any chemical change taking place.