Question detail
Which of the following is a product of the complete combustion of alkanes?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Alkanes
Question
- A. Carbon monoxide
- B. Carbon dioxide
- C. Soot
- D. Water vapor
Answer
Carbon dioxide
Explanation
During complete combustion of alkanes, the products are carbon dioxide and water vapor when there is sufficient oxygen. Carbon monoxide and soot are products of incomplete combustion.
Common mistake
Incorrect Equation for Combustion
Students often write the equation for the complete combustion of alkanes incorrectly, such as CnH2n + O2 → CO + H2O instead of CnH2n + O2 → nCO2 + nH2O.
To fix this, remember that the complete combustion of alkanes produces carbon dioxide and water. Use the formula: CnH2n + O2 → nCO2 + nH2O. For example, for butane (C4H10), the equation is C4H10 + 6.5O2 → 4CO2 + 5H2O.
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