Question

What is the other name for impure substances? Give two examples of impure substances.

Answer 1

Impure substances:

• when two or more substances are mixed without having any chemical change, then the final substance is known as an impure substance.
• Impure substances are also called mixtures.
• It can also be split into simpler substances.
• For example, a mixture of salt(NaCl) and water(H₂O), and a mixture of sand and water.

Therefore, an impure substance means a mixture of two or more substances.

For example, saltwater is an impure substance. It is a mixture of salt and water.