Question

select the correct answer. consider a mixture of soil and water and compare it to a colloid, such as milk. which property best differentiates these two mixtures? a soil and water is a suspension because it consists of minute particles suspended in the medium. milk is a colloid because it consists of larger particles suspended in the medium, which start to settle when allowed to stand. b soil and water is a colloid because it consists of minute particles suspended in the medium. milk is a suspension because it consists of larger particles suspended in the medium, which start to settle when allowed to stand. c soil and water is a colloid because it has a uniform composition. milk is a suspension because it doesnt have a uniform composition. d soil and water is a suspension because it consists of larger particles suspended in the medium, which start to settle when allowed to stand. milk is a colloid because it consists of minute particles that remain suspended in the medium. e soil and water is a suspension because it has a uniform composition. milk is a colloid because it doesnt have a uniform composition. reset next

Explanation:

To solve this, we recall the definitions of suspensions and colloids:

• Suspension: Contains larger, insoluble particles that settle over time (e.g., soil + water: soil particles are large and settle).
• Colloid: Contains minute particles that do not settle and often have a uniform appearance (e.g., milk: fat/protein particles are small and remain suspended).

Now analyze the options:

• Option A: Incorrect. Soil + water has larger (not minute) particles; milk is a colloid (not suspension).
• Option B: Incorrect. Soil + water is a suspension (not colloid); milk is a colloid (not suspension).
• Option C: Incorrect. Soil + water is a suspension (not colloid); milk is a colloid (not suspension).
• Option D: Correct. Soil + water is a suspension (larger particles settle). Milk is a colloid (minute particles remain suspended).
• Option E: Incorrect. Soil + water has non - uniform composition (particles settle); milk is a colloid (has uniform composition).

Answer:

D. Soil and water is a suspension because it consists of larger particles suspended in the medium, which start to settle when allowed to stand. Milk is a colloid because it consists of minute particles that remain suspended in the medium.