CAIE IGCSE Chemistry Photosynthesis in the Carbon Cycle
Practise describing photosynthesis with its reactants, products, light and chlorophyll conditions and its role in removing atmospheric carbon dioxide.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- identify carbon dioxide and water as reactants and glucose and oxygen as products
- state that photosynthesis requires light energy and chlorophyll in green plants
- use photosynthesis as the carbon-cycle process that removes carbon dioxide from air
10.3.5—Photosynthesis as the reaction between question 1
[Maximum number: 1]
Four statements about photosynthesis are listed.
1 Chlorophyll is required for photosynthesis.
2 The equation for photosynthesis is \(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}+6 \mathrm{O}_{2} \rightarrow 6 \mathrm{CO}_{2}+6 \mathrm{H}_{2} \mathrm{O}\).
3 Photosynthesis requires energy from light.
4 Photosynthesis releases carbon dioxide, which can lead to climate change.
Which statements are correct?
A
1 and 3
B
1 and 4
C
2 and 3
D
2 and 4
A
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