Post-UTME Chemistry 2015 Objective — Question 9
Question 9 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2015 Objective paper, with the correct answer and a full explanation.
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CaCO3(s) <=> CaO(s) + CO2(g). What is the expression for the equilibrium constant of the reaction above?
- A. [CaO][CO2]
- B. [CaCO3]
- C. [CaO][CO2]/[CaCO3]
- D. [CO2]Correct
Explanation
Since CaCO3 and CaO are solids (excluded from the equilibrium expression), Kc = [CO2].
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