Which type of mixture appears uniform and the same throughout?

• A. A suspension
• B. A heterogeneous mixture
• C. A colloid
• D. A solution

Answer: (D)

Verified step by step guidance

1. Understand the definitions of the types of mixtures: A suspension is a mixture where particles are large enough to settle out over time, making it non-uniform; a heterogeneous mixture has visibly different components; a colloid has particles dispersed throughout but they do not settle and can scatter light; a solution is a homogeneous mixture where the composition is uniform throughout.
2. Recognize that the question asks for the type of mixture that appears uniform and the same throughout, which means the mixture looks consistent at the macroscopic level without visible separation.
3. Recall that in a solution, the solute particles are dissolved at the molecular or ionic level, making the mixture appear completely uniform and transparent or consistent in appearance.
4. Contrast this with suspensions and heterogeneous mixtures, which show visible differences or settling, and colloids, which may appear uniform but can scatter light (Tyndall effect) and are not truly uniform at the molecular level.
5. Conclude that the mixture type that appears uniform and the same throughout is a solution.