Question detail
Which of the following statements is true about complete combustion?
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. It produces carbon and water.
- B. It produces carbon dioxide and water.
- C. It produces carbon monoxide and hydrogen.
- D. It produces only carbon dioxide.
Answer
The correct option is It produces carbon dioxide and water..
Explanation
The correct option is It produces carbon dioxide and water.. It produces carbon dioxide and water. is correct because it directly supports the approved learning objective to state that complete combustion of a hydrocarbon produces carbon dioxide and water. This belongs to Properties and combustion of hydrocarbons 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 Products of Combustion
Students often state that complete combustion of hydrocarbons produces carbon monoxide instead of carbon dioxide.
Remember that complete combustion occurs when there is enough oxygen, resulting in carbon dioxide and water as products.
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