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When a homemade oil-and-vinegar salad dressing is left standing, it separates into layers. The salad dressing is a

A. solution
B. suspension
C. colloid
D. compound

Answer :

Final answer:

A salad dressing made from oil and vinegar that separates into layers when left standing is a suspension. This is because the oil and vinegar particles are not uniformly mixed and settle out over time, defining the characteristics of a suspension.

Explanation:

When a homemade oil-and-vinegar salad dressing is left standing, it separates into layers. This occurs because oil and vinegar don't mix uniformly, but rather form distinct layers upon standing. This demonstrates that the salad dressing falls under the category of a suspension. In a suspension, particles are dispersed in a liquid but will eventually settle out, unlike a solution where substances mix completely, or a colloid where particles don't settle out. Therefore, the correct answer to your question is (b) suspension.

Learn more about Suspensions here:

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