Question detail
Describe crude oil as a mixture of compounds.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Carbon compounds as fuels and feedstock
Question
Describe crude oil as a mixture of compounds.
Answer
Crude oil is a mixture of a very large number of compounds. Most of those compounds are hydrocarbons, meaning they contain hydrogen and carbon atoms only. The mixture can be separated into fractions because different hydrocarbons have different boiling points.
Explanation
This answer focuses on mixture composition. Crude oil is not a pure substance or a single formula. It contains many hydrocarbon molecules with different chain lengths, which is why fractional distillation can separate it into useful fractions.
Common mistake
Misidentifying crude oil as a single compound
Students often think crude oil is a single, pure substance rather than a complex mixture of many hydrocarbons and other compounds.
Explain that crude oil is a heterogeneous mixture containing thousands of different molecules, mainly hydrocarbons, and that this diversity is why fractional distillation is needed to separate useful fractions.
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