CAIE IGCSE Chemistry 6.4.3 Oxidation As Gain of Oxygen and Questions
Track oxygen gain and loss in equations to identify oxidation, reduction, roasting, combustion and metal-oxide reduction.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- define oxidation as gain of oxygen and reduction as loss of oxygen
- track oxygen across an equation to identify which substance is oxidised or reduced
- recognise roasting or combustion as oxidation
- identify metal-oxide conversion to metal as reduction
CAIE IGCSE Chemistry 6.4.3 Oxidation As Gain of Oxygen and Questions question 1
[Maximum number: 1]
When heated strongly, silicon(IV) oxide reacts with carbon.
SiO2+2C→Si+2CO
Which term describes what happens to silicon(IV) oxide?
A
thermal decomposition
B
neutralisation
C
oxidation
D
reduction
D
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