Question detail
What is the main characteristic of the fractions obtained from crude oil?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Carbon compounds as fuels and feedstock
Question
- A. They contain only one type of hydrocarbon.
- B. They have similar boiling points.
- C. They are all gases at room temperature.
- D. They are all solid at room temperature.
Answer
The correct option is They have similar boiling points..
Explanation
The correct option is They have similar boiling points.. They have similar boiling points. is correct because it directly supports the approved learning objective to explain that fractions can be processed to produce fuels and feedstock for the petrochemical industry. This belongs to Fractional distillation and petrochemicals within Carbon compounds as fuels and feedstock, so the answer must use the correct organic chemistry context. The other options are incorrect when they confuse the organic family, formula type, reaction condition, product, or property being tested. Keep molecular formula, structural formula, displayed formula, and general formula distinct. Do not confuse alkanes with alkenes, saturated with unsaturated, cracking with combustion, polymers with monomers, or hydrocarbons with oxygen-containing alcohols and carboxylic acids. When formulae are used, preserve the stored notation exactly and explain the GCSE chemistry idea in words rather than using unsupported displayed-formula diagrams.
Common mistake
Misunderstanding Fraction Processing
Students often think that fractions from crude oil are pure substances rather than mixtures of hydrocarbons.
Emphasize that fractions are mixtures containing hydrocarbons with similar carbon chain lengths, which can be further processed to create fuels and feedstock.
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