AP Chemistryeasymcq1 pt
Which of the following is a heterogeneous mixture?
A.Oil-and-vinegar salad dressing
B.Distilled white vinegar
C.Clean dry air
D.Stainless steel
Explanation
Core Concept
Oil and vinegar are immiscible, so the bottle separates into visibly distinct layers whose compositions differ from point to point. Nonuniformity is the defining trait of a heterogeneous mixture. Samples poured from the top and the bottom differ, which is the practical giveaway.
Correct Answer
AOil-and-vinegar salad dressing
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