Which choice can be classified as a pure substance?

Question

Responses

solution

solution

heterogeneous mixture

heterogeneous mixture

compound

compound

homogeneous mixture

Answer 1

A pure substance can be classified as a compound.

In contrast, solutions and homogeneous mixtures are composed of multiple substances that are uniformly distributed, while heterogeneous mixtures consist of visibly different substances or phases. Thus, among the options provided, a compound is the only choice that qualifies as a pure substance.