Quiz  /  Equilibrium State Class 11 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. 
    New technology advances the rate at which furniture can be assembled. Why does this change the supply?

  • There is a change in cost of production.
  • The number of producers changes.
  • The expectations of consumers changes.
  • The output rate declines.

  • 3. 
    What is equal in an equilibrium reaction?

  • concentrations
  • rates
  • moles
  • masses

  • 4. 
    Which is the reactant - and why?

  • A, as concentration decreases
  • B, as concentration decreases
  • A, as concentration increases
  • B, as concentration increases

  • 5. 
    Changes in pressure will only affect substances that are in the __________ state.

  • gaseous
  • liquid
  • solid

  • 6. 
    What best refers to the situation when the price of a good or service changes?

  • there is a movement along a stable demand curve.
  • demand shifts in the opposite direction.
  • demand shifts in the same direction.
  • supply shifts in the opposite direction.

  • 7. 
    At what time the reaction reached equilibrium?

  • t1
  • t2
  • t3
  • t4

  • 8. 
    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."

  • 9. 
    Refer to Graph 4-5. According to the graph, what are the equilibrium price and quantity?

  • $7, 20.
  • $7, 60.
  • $5, 40.
  • $3, 60.

  • 10. 
    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.

  • 11. 
    When companies compete in a market economy, what is usually the result?

  • Consumers are able to buy goods for the best available price.
  • People pay much higher prices for goods.
  • There are frequent shortages of goods on the market.
  • Producers refuse to sell some of their products.

  • 12. 
    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

  • 13. 
    If a salt solution is at equilibrium, it is

  • unsaturated
  • saturated
  • super-saturated
  • salty

  • 14. 
    Which situation is most likely to lead to the lowest prices?

  • There is only one producer making the good.
  • Businesses secretly agree to share their profits.
  • Competition between businesses is prohibited.
  • Several producers compete to sell goods to the public.

  • 15. 
    What 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]2
  • Kc = [NO]2 [O2] [NO2]2
  • Kc = [NO2]2 / [NO]2 +  [O2]

  • 16. 
    The 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
  • .25
  • 1

  • 17. 
    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

  • 18. 
    Which statement expresses a central idea of how the laws of supply and demand work?

  • The government sets the prices for goods and services.
  • Prices are determined by the interaction of producers and consumers.
  • Consumers alone determine the prices for goods and services.
  • Technology dictates the prices charged for goods and services.

  • 19. 
    The "E" in ICE problems stands for

  • Energy
  • Europium
  • Equilibrium
  • Entropy

  • 20. 
    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

  • 21. 
    Which of the following would NOT be a determinant of demand?

  • The price of related goods
  • Income
  • Tastes
  • The prices of the inputs used to produce the good

  • 22. 
    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.

  • 23. 
    An equilibrium constant, Keq is defined as

  • product concentrations - reactant concentrations
  • reactant concentrations - product concentrations
  • [reactant] / [product]
  • [product] / [reactant]

  • 24. 
    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]

  • 25. 
    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

  • 26. 
    For 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)

  • 27. 
    Refer to Table 4-2. In the table shown, what would be the result if the price were $8?

  • a surplus of 30 units would exist and price would tend to fall.
  • a surplus of 60 units would exist and price would tend to rise.
  • a surplus of 60 units would exist and price would tend to fall.
  • a shortage of 30 units would exist and price would tend to rise.

  • 28. 
    For the reaction...N2 + O2 <=> 2NOIf O2 is removed, the concentration of N2 will _______.

  • increase
  • decrease
  • remain the same
  • double

  • 29. 
    Refer to Graph 4-5. According to the graph, What occurs at a price of $7?

  • there would be a shortage of 40 units.
  • there would be a surplus of 40 units.
  • there would be a surplus of 20 units.
  • the market would be in equilibrium.

  • 30. 
    An equilibrium constant with a large value, e.g. Kc = 1000, indicates…

  • A very fast reaction
  • Mostly products at equilibrium
  • Mostly reactants at equilibrium
  • Nothing useful at all
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