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- 1. Multiple Choice
This symbol indicates that a reaction is ____________reversibleirreversible - 2. Multiple ChoiceWhich is the reactant - and why?A, as concentration decreasesB, as concentration decreasesA, as concentration increasesB, as concentration increases
- 3. Multiple ChoiceWhen the system X + 2 Y <=> Z has reached equilibrium, which of the following is TRUE?Forward reaction and Backward reaction stop.Forward reaction has sped up and backward reaction has slowed down.Forward and backward reactions occur at the same rate.Forward reaction has slowed down and backward reaction has sped up.
- 4. Multiple ChoiceAt what time the reaction reached equilibrium?t1t2t3t4
- 5. Multiple ChoiceFor the reaction...
SO2 + O2 <=> SO3
If the concentration of SO2 is increased, the equilibrium position of the reaction will shift ___________.to the leftto the rightto the left and rightneither left nor right - 6. Multiple ChoiceFor the reaction...
SO2 + O2 <=> SO3
If the equilibrium position shifts to the right, the concentration of O2 will ___________.increasedecreaseremain the samedouble - 7. Multiple ChoiceFor the reaction...
N2 + O2 <=> 2NO
If O2 is removed, the concentration of N2 will _______.increasedecreaseremain the samedouble - 8. Multiple ChoiceFor the reaction...
N2 (g) + 3 H2 (g) <=> 2 NH3 (g)
If the pressure in the system is increased, which substance(s) will increase in concentration?N2 (as 2 mol gas → 4 mol gas)H2 (as 2 mol gas → 4 mol gas)N2 and H2 (as 2 mol gas → 4 mol gas)NH3 (as 4 mol gas → 2 mol gas) - 9. Multiple ChoiceFor the reaction...
N2 + O2 <=> 2NO: Δ H = +182 kJ mol-1.
If the temperature is increased the equilibrium position will shift _______.to the leftto the rightto the left and rightneither left nor right - 10. Multiple ChoiceWhat is the Kc expression for this reaction?
2 NO(g) + O2(g) ⇌ 2 NO2(g)Kc = [NO2]2 / [NO]2 [O2]Kc = [NO]2 [O2] / [NO2]2Kc = [NO]2 [O2] [NO2]2Kc = [NO2]2 / [NO]2 + [O2] - 11. Multiple ChoiceConsider the following reaction:
2SO2(g) + O2(g) <=> 2SO3(g): ΔΗ = - 197 kJ mol -1
Which of the following will NOT shift the equilibrium position to the right?Adding more O2Adding a catalystincreasing the pressureLowering the temperature - 12. Multiple ChoiceAn equilibrium constant with a large value, e.g. Kc = 1000, indicates…A very fast reactionMostly products at equilibriumMostly reactants at equilibriumNothing useful at all
- 13. Multiple ChoiceLe Chatelier's Principle states that....
If a (dynamic) equilibrium is disturbed by changing the conditions, the position of equilibrium................moves to increase the changemoves to counteract the changedoes not change - 14. Multiple ChoiceGiven: 2A(g) <=> 2B(g) + C(g). At a particular temperature, Kc = 16000.
Raising the pressure, by decreasing the volume of the container, will...cause the value of Kc to increasecause the value of Kc to decreasehave no effect on the value of Kc as temperature does not changefavour the forward reaction - 15. Multiple ChoiceChanges in pressure will only affect substances that are in the __________ state.gaseousliquidsolid
- 16. Multiple ChoiceWhat are [A] and [B]?concentration of reactantsconcentration of productsenergy of reactantsenergy of products
- 17. Multiple ChoiceThe following reaction :
SO2 (g) + NO2 (g) <=> SO3 (g) + NO (g)
had reached a state of equilibrium, was found to contain
0.40 mol L-1 SO3 , and 0.30 mol L-1 NO,
0.15 mol L-1NO2 , and 0.20 mol L-1 SO2.
Calculate the equilibrium constant for this reaction.4.42.251 - 18. Multiple ChoiceIn an exothermic reaction energy is transferred fromreactants to their surroundingsthe surroundings to reactantsone reactant to anotherthe container to the chemicals
- 19. Multiple ChoiceWhat is the equilibrium expression for:
Fe3O4(s) + 4H2(g) <=> 3Fe(s) + 4H2O(g)
Kc =[Fe]3 [H2O]4 / [Fe3O4] [H2]4[Fe3O4] [H2]4 / [Fe]3 [H2O]4[H2O]4 / [H2]4[Fe] [H2O] / [Fe3O4] [H2] - 20. Multiple ChoiceFor the reaction...
H2 (g) + Cl2 (g) <=> 2HCl (g) + heat
If the pressure in the system is increased, the equilibrium position will _______.shift to the leftshift to the rightnot shift position at all as 2 mol gas <=> 2 mol gas - Answer choicesTagsAnswer choicesTags