Question

Which of the following CANNOT be considered a single phase

Answer 1

Answer:   a heterogeneous mixture

Explanation:  Single phase is defined as the only phase where you cannot see any differentiation in the phases. It will appear as the single form.

A heterogeneous mixture is not a single phase because it is defined as the mixture which contain substances of different phases. Thus there will be more than one phase.

A pure solid is only a single phase or form of solid.

A pure liquid is also consist of only single phase.

A homogeneous mixture is the mixture in which different substances are present but their form is same thus making the mixture a single phase.

Answer 2

I believe a heterogenous mixture cannot be considered as a single phase.