Chemistry Quiz: Chemical Equilibrium

10 Questions

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Chemistry Quiz: Chemical Equilibrium

Chemical equilibrium is a state in a chemical reaction in which the centration of both products and reactants do not change with time, hence no change in their properties. So, what do you know further? Well, this quiz deals with various questions on this topic. Let's see how much you know!


Questions and Answers
  • 1. 
    What is true about the equilibrium state?
    • A. 

      The forward reaction stops.

    • B. 

      The reverse reaction stops.

    • C. 

      Both forward and reverse reactions stops.

    • D. 

      Both forward and reverse reactions continue at the same rate.

  • 2. 
    When a mixture of H2 and I2 is sealed in a flask and temperature is kept at 25C? Which substance or substances will be present in the equilibrium mixture?
    • A. 

      H2 and I2 

    • B. 

      H2 only

    • C. 

      H2 only

    • D. 

      H2, I2 and HI

  • 3. 
    What are the units for?
    • A. 

      Mol.dm-3

    • B. 

      Mol2.dm6

    • C. 

      Dm3.mol-1

    • D. 

      No units

  • 4. 
    Which of the following reactions will not have any units for Kc?
    • A. 

      Option 1

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      All of these

  • 5. 
    Concentrations of reactants and products at equilibrium remain unchanged if ?
    • A. 

      Concentration of any reactant or product is not changed

    • B. 

      Temperature of reaction is not changed

    • C. 

      Pressure or volume of the system is not changed

    • D. 

      All of the above are observed

  • 6. 
    Which of the following does not happen, when system is at equilibrium?
    • A. 

      Forward and reverse reaction stop.

    • B. 

      Forward and reverse reaction become equal.

    • C. 

      Concentration of reactant and product stop changing.

    • D. 

      Reaction continues to occur in both directions

  • 7. 
    For which reaction, Kc has units of mol.dm-3?
    • A. 

      Option 1

    • B. 

      Option 2

    • C. 

      Option 3

    • D. 

      Option 4

  • 8. 
    In irreversible reaction, equilibrium is?
    • A. 

      Established quickly

    • B. 

      Established slowly

    • C. 

      Never established

    • D. 

      Established  when reaction stops.

  • 9. 
    Active mass means?
    • A. 

      Total mass of reactants

    • B. 

      Total mass of products

    • C. 

      Total mass of reactants and products

    • D. 

      Mass of substance in mole per dm-3 in a dilute solution

  • 10. 
    For a reversible reaction, Which substance is product of the reaction?
    • A. 

      A

    • B. 

      B

    • C. 

      Both A and B

    • D. 

      C

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