Question detail
Why are alkenes, a product of cracking, considered useful for fuel production?
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 are more stable than alkanes.
- B. They have a higher boiling point than alkanes.
- C. They are more reactive and can be used to produce other fuels.
- D. They contain oxygen, improving combustion.
Answer
The correct option is They are more reactive and can be used to produce other fuels..
Explanation
The correct option is They are more reactive and can be used to produce other fuels.. They are more reactive and can be used to produce other fuels. is correct because it directly supports the approved learning objective to explain that some cracked products are useful as fuels because there is a high demand for fuels with small molecules. This belongs to Cracking and alkenes 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 the Demand for Small Molecules
Students often confuse the usefulness of cracked products with the size of the molecules, thinking that all small molecules are fuels.
Clarify that only certain small molecules, specifically those produced from cracking, are in high demand as fuels due to their efficiency and combustion properties.
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