IMAT Equilibria in aqueous solution questions

Sample questions

1. 1IMAT Doutor

   Extra solid calcium carbonate is added to the equilibrium CaCO3(s) in equilibrium with CaO(s) + CO2(g) in a sealed vessel at constant temperature. What is the effect?
   1. AThe equilibrium shifts to the right, because more reactant is now present in the vessel
   2. BThe equilibrium shifts to the left, because the extra solid absorbs some of the CO2
   3. CThe value of Kp doubles, because the amount of solid reactant has doubled
   4. DThere is no effect, because pure solids do not appear in the equilibrium expression
   5. EThe value of Kp is halved, because the CO2 is shared between more solid
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2. 2IMAT 2025 Q41

   Given the equilibrium Heat + 2FeCl₃ (s) ⇌ 2FeCl₂ (s) + Cl₂ (g) Which of the following options is correct:
   1. Ato shift the equilibrium to the right, it is necessary to increase the concentration of FeCl₃ (s).
   2. Bto shift the equilibrium to the left, it is necessary to increase the concentration of Cl₂.
   3. Cto shift the equilibrium to the left, it is necessary to remove FeCl₃ (s).
   4. Dto shift the equilibrium to the right, it is necessary to cool the reaction.
   5. Eto shift the equilibrium to the left, it is necessary to increase the concentration of FeCl₂ (s).
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