Quiz  /  Chemical Equilibrium Class 11 MCQ Questions With Answers

  • 1. 
    During the reaction P4 + 5O2 → P4O10, 0.800 mole of product was made in 15.0 seconds. What is the rate of reaction?

  • 56.8 g/min
  • 908 g/min

  • 2. 
    What is the molarity of 3 mole of hydrochloric acid in 3 L of water.

  • 3
  • 1
  • 6
  • 9

  • 3. 
    Which represents the addition of an enzyme in the reaction?

  • 3
  • 4
  • 2
  • 1

  • 4. 
    What makes an effective collision?

  • When molecules collide.
  • When molecules collide with the proper orientation.
  • When molecules collide with proper orientation and enough kinetic energy.
  • High Temperature.

  • 5. 
    What are [C] and [D]?

  • concentration of reactants
  • concentration of products
  • energy of reactants
  • energy of products

  • 6. 
    What is the equilibrium-constant expression for CO2(g) + H2(g) ↔ CO(g) + H2O(l)

  • Kc= [CO][H2O] / [CO2][H2]
  • Kc= [CO2][H2] / [CO]
  • Kc= [CO2][H2] / [CO][H2O]
  • Kc= [CO] / [CO2][H2]

  • 7. 
    How could we make this reaction happen more quickly?

  • Decrease the concentration of the acid
  • crush the chalk to increase the surface area
  • Put the test tube in an ice bath

  • 8. 
    What is the molarity of 1 mole of Ba+ in 2 L of water

  • 1 M
  • 2 M
  • .5 M
  • .25 M

  • 9. 
    What is the Keq expression for this reaction? 2 NO(g) + O2(g) ⇌ 2 NO2(g)

  • Keq = [NO2]2 / [NO]2 [O2]
  • Keq = [NO]2 [O2] / [NO2]2
  • Keq = [NO]2 [O2] [NO2]2
  • Keq = [NO2]2 / [NO]2 + [O2]

  • 10. 
    What is the molarity of a solution which contains 22.41 grams of NaCl in 50.0 mL of solution?

  • 0.488 M
  • 7.67 mol
  • 7.67 M
  • 0.00767 M

  • 11. 
    A complete reaction is in which:

  • All the reactants convert into products
  • All the reactants do not convert into products
  • Half reactants convert into products
  • only 10% reactants convert into products

  • 12. 
    For the reaction...heat + N2 + O2 ↔ 2NOIf the heat is added to the chemical system, the equilibrium will shift _______.

  • left
  • right
  • left and right
  • neither left nor right

  • 13. 
    Such reactions which continue in both directions are called:

  • Irreversible reactions
  • Reversible reactions
  • Non-reactive reactions
  • dynamic reactions

  • 14. 
    2SO2(g)+O2(g)⇌2SO3(g)Adding SO2(g) will

  • shift equilibrium right
  • shift equilibrium left
  • increase rate of reaction
  • have no change
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