Question

Which of the following statement is false regarding mixtures?

• A. Salads are heterogeneous mixtures
• B. $NaCl\left(aq\right)$ is a homogeneous mixture
• C. Milk is a homogeneous mixture
• D. Sand and water make a heterogeneous mixture
• E. Pure iron is a heterogeneous mixture

Answer 1

Answer: (E)

Pure iron is a heterogeneous mixture

A homogeneous mixture has the same uniform appearance and composition throughout.

A heterogeneous mixture consists of visibly different substances or phases. A salad with lettuce, cheese, seeds, tomatoes, broccoli, and other vegetables is an example of a heterogeneous mixture.

$NaCl\left(aq\right)$ solution and milk is a homogeneous mixture that has a uniform composition throughout.

Sand and water make a heterogeneous mixture as sand is insoluble in water and the mixture has localized regions with different properties.

Pure iron is not at all a mixture. It is a pure form of an element and can not be classified as a homogeneous or heterogeneous mixture.

Hence, option $E$ represents a false statement regarding mixtures.