O-LevelChemistryChemistry of the Environment5070/11 · Oct/Nov 2021 · Q351 Mark

The carbon cycle regulates the amount of carbon dioxide in the atmosphere. Combustion, photosynthesis and respiration are involved in this cycle. How do these processes affect the amount of carbon dioxide in the atmosphere?

Aincreases increases increases

Bincreases decreases increases

Cdecreases increases decreases

Ddecreases decreases decreases

✓ Correct answer

B: increases decreases increases

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Topic: Chemistry of the Environment, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2021 Paper 1 Variant 1, question 35.

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