Quiz  /  Equilibrium State Class 12 MCQ Questions With Answers

  • 1. 
    For the reaction...N2 + O2 <=> 2NO: Δ H = +182 kJ mol-1.If the temperature is increased the equilibrium position will shift _______.

  • to the left
  • to the right
  • to the left and right
  • neither left nor right

  • 2. 
    Changes in pressure will only affect substances that are in the __________ state.

  • gaseous
  • liquid
  • solid

  • 3. 
    At what time the reaction reached equilibrium?

  • t1
  • t2
  • t3
  • t4

  • 4. 
    What does the Latin phrase Ceteris paribus literally mean?

  • "other things being equal."
  • "after this therefore because of this."
  • "to respond slowly to a change in price."
  • "There's no such thing as a free lunch."

  • 5. 
    If the price of a substitute to good X increases, then

  • The demand for good X will increase.
  • The market price of good X will decrease.
  • The demand for good X will decrease.
  • The demand for good X will not change.

  • 6. 
    Other things equal, when the price of a good rises, the quantity supplied of the good also rises. What best refers to this situation?

  • The law of increasing costs.
  • The law of diminishing returns.
  • The law of supply.
  • The law of demand

  • 7. 
    If a salt solution is at equilibrium, it is

  • unsaturated
  • saturated
  • super-saturated
  • salty

  • 8. 
    If an equilibrium constant is very small, K<< 1,

  • you have more products than reactants at equilibrium
  • you have more reactants than products at equilibrium
  • you have small concentrations of all chemicals
  • you have large concentrations of all chemicals

  • 9. 
    The "E" in ICE problems stands for

  • Energy
  • Europium
  • Equilibrium
  • Entropy

  • 10. 
    If a system at equilibrium "shifts right"

  • more products are made, reducing reactant concentrations
  • more reactants are made, reducing product concentrations
  • the reaction speeds up
  • the reaction slows down

  • 11. 
    What will happen in the rice market if buyers are expecting higher prices in the near future?

  • The demand for rice will increase.
  • The demand for rice will decrease.
  • The demand for rice will be unaffected.
  • The supply of rice will increase.

  • 12. 
    What 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]

  • 13. 
    Consider the following reaction: 2SO2(g) + O2(g) <=> 2SO3(g): ΔΗ = - 197 kJ mol -1Which of the following will NOT shift the equilibrium position to the right?

  • Adding more O2
  • Adding a catalyst
  • increasing the pressure
  • Lowering the temperature

  • 14. 
    For the reaction...N2 + O2 <=> 2NOIf O2 is removed, the concentration of N2 will _______.

  • increase
  • decrease
  • remain the same
  • double

  • 15. 
    What is the amount that producers benefit by selling at a market price that is higher than the least that they would be willing to sell for?

  • Shortage
  • Surplus
  • Consumer Surplus
  • Producer Surplus

  • 16. 
    For the reaction...SO2 + O2 <=> SO3If the concentration of SO2 is increased, the equilibrium position of the reaction will shift ___________.

  • to the left
  • to the right
  • to the left and right
  • neither left nor right

  • 17. 
    What do you call the difference between the maximum price a consumer is willing to pay and the actual price they do pay?

  • Surplus
  • Consumer Surplus
  • Shortage
  • Producer Surplus

  • 18. 
    Suppose you like banana cream pie made with vanilla pudding. Assuming all other things are constant, you notice that the price of bananas is higher. How would your demand for vanilla pudding be affected by this?

  • It would decrease.
  • It would increase.
  • It would be unaffected.
  • There is insufficient information given to answer the question.

  • 19. 
    For the reaction...SO2 + O2 <=> SO3If the equilibrium position shifts to the right, the concentration of O2 will ___________.

  • increase
  • decrease
  • remain the same
  • double

  • 20. 
    In a system at equilibrium

  • the forward reaction stops
  • the reverse reaction stops
  • both reactions stop
  • both reactions continue at the same rate

  • 21. 
    Which is TRUE about shortage?

  • The quantity demanded is greater than the quantity supplied.
  • Buyers are easy to find because the quantity demanded is high.
  • Sellers take the opportunity to increase their price since there is an urgent need.
  • All of above

  • 22. 
    Which of the following happens when the Qs is greater than the Qd?

  • Equilibrium
  • Surplus
  • Shortage
  • Consumer surplus

  • 23. 
    Equilibrium divides the demand curve in to two. What are these parts?

  • Buyers
  • Non Buyers
  • Sellers
  • Both A & B

  • 24. 
    Given: 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 increase
  • cause the value of Kc to decrease
  • have no effect on the value of Kc as temperature does not change
  • favour the forward reaction

  • 25. 
    What happens if there is surplus?

  • Sellers offer their products by lowering the price
  • Sellers offer their products by raising the price
  • Buyers are easy to find
  • Sellers stick to the price they are offering

  • 26. 
    Mr Coyote goes to the ticket booth to buy tickets for a Spurs game. Mr. Coyote is told that the game is sold out and no tickets are available. Which best explains why there are no basketball tickets available?

  • The arena forgot to print enough tickets.
  • The supply of tickets was greater than the demand.
  • The arena charged too much money for each ticket.
  • The demand for tickets was greater than the supply.

  • 27. 
    This symbol indicates that a reaction is ____________

  • reversible
  • irreversible

  • 28. 
    The units of concentration used in equilibrium constant expressions is

  • molality
  • molarity
  • % concentration by mass
  • ppm
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