Equilibrium Chemical Reaction Quiz Questions

9 Questions | By Eshaw | Last updated: Mar 21, 2022 | Total Attempts: 1392

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Equilibrium Chemistry

Questions and Answers

1.

Which factors must be equal in a reversible chemical reaction at equilibrium?
- A.
  
  The concentrations of the reactants and products
- B.
  
  The potential energies of the reactants and products
- C.
  
  The activation energies of the foward and reverse reactions
- D.
  
  The rates of reaction of the foward and reverse reactions
2.

In a reversible reaction, chemical equilibrium is attained when the
- A.
  
  Rate of the foward reaction is greater than the rate of the reverse reaction
- B.
  
  Rate of the reverse reaction in greater than the rate of the forward reaction
- C.
  
  Concentration of the reactants reaches zero
- D.
  
  Concentration of the products remains constant
3.

Given the reaction at equilibrium:A(g) + B(g) + heat<----> AB(g)As the pressure increases at constant temperature, the value of the equilibrium constant
- A.
  
  Decreases
- B.
  
  Increases
- C.
  
  Remains the same
4.

Which type of reaction is most favored by an increase in temperature?
- A.
  
  Endothermic
- B.
  
  Exothermic
- C.
  
  Spontaneous
5.

The equilibrium constant for a given system will change when:
- A.
  
  The temperature changes
- B.
  
  The reactant concentration changes
- C.
  
  The pressure changes
- D.
  
  A catalyst is added
6.

A solution that is at equilibrium must be
- A.
  
  Concentrated
- B.
  
  Dilute
- C.
  
  Saturated
- D.
  
  Unsaturated
7.

When is equilibrium reached in a chemical reaction?
- A.
  
  When the forward reaction stops.
- B.
  
  The reverse reaction stops.
- C.
  
  The concentrations of the reactants and products become equal.
- D.
  
  The rates of the forward and reverse reactions become equal.
8.

For a system at equilibrium, lowering the temperature will always:
- A.
  
  Increase the rate of the reaction
- B.
  
  Increase the concentrations of the products
- C.
  
  Favor the endothermic
- D.
  
  Favor the exothermic
9.

Which change may occur in a reaction system when a catalyst is addded?
- A.
  
  The potential energy of the reactants increases.
- B.
  
  The potential energy of the products increases.
- C.
  
  The point of equilibrium is reached more rapidly.
- D.
  
  The heat of reaction decreased.