The mixture of nitrogen and oxygen gases that make up the air in a closed room is an example of a heterogeneous mixture.

Answer: The given statement is false.

Explanation:

When a mixture contains two or more components that are evenly mixed together in a solvent is known as a homogeneous solution.

For example, when nitrogen and oxygen gases that make up the air in a closed room is an example of a homogeneous mixture as they are evenly mixed together.

And, whenever there occurs unequal distribution of components of the solvent and solute then the resulting solution is known as heterogeneous solution.

Thus, we can conclude that the statement mixture of nitrogen and oxygen gases that make up the air in a closed room is an example of a heterogeneous mixture, is a false statement.