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IB Chemistry SL 1.3.2 Incomplete Combustion Questions

Use real exam questions to identify incomplete-combustion products, balance equations and explain how oxygen supply affects emissions.

Syllabus
First assessment 2025
Course
Chemistry SL
Level
SL

Exam points

  • Identify carbon monoxide, carbon or other products that distinguish incomplete from complete combustion for the specified fuel.
  • Balance an incomplete-combustion equation for a hydrocarbon, alcohol or chlorine-containing polymer using the stated products and correct coefficients or states.
  • Explain how oxygen supply, air-to-fuel ratio, burner conditions or fuel composition cause incomplete combustion and affect emissions or an experimental result.

Learn this topic

Study 1.3.2—Incomplete combustion conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry SL 1.3.2 Incomplete Combustion Questions question 1

[Maximum number: 1]

Which products may be formed during incomplete combustion of octane?

A

CO2\mathrm{CO}_{2} and H2\mathrm{H}_{2}

B

CO and H2\mathrm{H}_{2}

C

CO and H2O\mathrm{H}_{2} \mathrm{O}

D

C, CO and H2\mathrm{H}_{2}

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