Solutions, colloids and suspensions Transitional Reasoning Practice

Questions

1. 1.

   In a laboratory investigation, a student examines three unknown aqueous mixtures labelled X, Y, and Z. Mixture X passes completely through standard filter paper without leaving a residue and does not scatter a narrow light beam. Mixture Y also passes through the filter paper without leaving a residue and remains uniformly dispersed after standing for two days, but it distinctly scatters the light beam. Mixture Z leaves a solid residue on the filter paper and settles into separate layers when left undisturbed. Based on these experimental findings, which conclusion correctly identifies the nature of these mixtures?

   • A) Mixture X is a solution because solute particles are smaller than 1 nm, Mixture Y is a colloid exhibiting the Tyndall effect without settling, and Mixture Z is a suspension with large, filterable particles.
   • B) Mixture X is a colloid because its particles cannot be trapped by filtration, Mixture Y is a solution because it does not settle upon standing, and Mixture Z is a suspension.
   • C) Mixture X is a suspension because it is stable, Mixture Y is a solution because it exhibits the Tyndall effect, and Mixture Z is a colloid because it forms separate phases.
   • D) Mixture X is a solution, Mixture Y is a suspension because it scatters visible light, and Mixture Z is a colloid because its particles are retained by filter paper.

Answers and step-by-step solutions appear after you finish the test.