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O-LevelChemistryRates of Reaction5070/11 · Oct/Nov 2024 · Q161 Mark

If calcium carbonate is heated in a closed container, it will decompose, forming calcium oxide and carbon dioxide. Calcium oxide and carbon dioxide can recombine to form calcium carbonate. After some time, a position is reached where calcium carbonate is decomposing, and calcium oxide and carbon dioxide are recombining at the same rate. What is this position called?

Aactivation energy
Bbackward reaction
Cequilibrium
Dneutralisation

✓ Correct answer

C: equilibrium

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About this question

Topic
Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source
O-Level Chemistry, Oct/Nov 2024 Paper 1 Variant 1, question 16.

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