CAIE IGCSE Chemistry 10.3.4 Reduction Strategies for Climate Questions

Work through real CAIE IGCSE Chemistry questions to select calcium oxide for acidic flue gases and interpret carbon-cycle processes linked to climate strategies.

Exam points

select calcium oxide or lime as the substance for flue gas desulfurisation
link heating limestone to calcium oxide used to neutralise acidic industrial gases
interpret carbon-cycle diagrams by identifying photosynthesis, respiration and combustion as climate-relevant processes

[Maximum number: 1]

Which oxide is used to neutralise acidic gases in flue gas desulfurisation?

A

calcium oxide

B

carbon dioxide

C

nitrogen oxide

D

sulfur dioxide

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