Question

Which of the following is a property of a pure substance?

1) It can be chemically separated if it is a compound.
2) Components that are mixed can be in different states of matter.
3) It is made up of two or more types of compounds.
4) The original components retain their individual properties.

Answer 1

A pure substance is that which can be chemically separated into simpler components if it is a compound. Elements, consisting of a single type of atom, and compounds, made of two or more types of atoms, are both considered pure substances.

Step-by-step explanation:

Among the given options, the property that describes a pure substance is that it can be chemically separated if it is a compound. This is because a pure substance can either be a single element, which is made up of only one kind of atom and cannot be chemically separated into simpler components, or a compound, which consists of a fixed combination of two or more types of atoms that can be separated through chemical reactions.