Chemical Equilibrium

What is true for catalyst in a chemical reaction?

• It impacts the equilibrium constant

• It disturbs the equilibrium composition

• It helps to attain the equilibrium faster

• None of the above.

• 1

• 1/2

• 1/4

• 4

How can chemical equilibrium be disturbed?

• By changing the temperature of the system

• By altering the pressure of the system

• By adding or removing reactants or products

• By increasing the surface area of the reaction vessel

Tags

NGSS.HS-PS1-6

Which term is used to describe equilibrium between different substances as reactants and products?

• Chemical equilibrium

• Physical equilibrium

• Dynamic equilibrium

• Irreversible equilibrium

Tags

NGSS.HS-PS1-6

What is the condition required for chemical equilibrium to be achieved?

• The concentrations of reactants and products must be equal

• The forward reaction rate must be faster than the reverse reaction rate

• The rates of the forward and reverse reactions must be equal

• The temperature must be constant throughout the reaction

Tags

NGSS.HS-PS1-6

Chemical equilibrium can be compared to the movement of skiers at a busy ski resort because:

• The number of skiers carried up the mountain is equal to the number coming down the slopes

• The number of people at the top and the number at the bottom of the slope do not change

• Skiers undergo physical processes similar to the changes in chemical equilibrium

• The concentration of skiers at the top and the bottom of the slope remains constant

How can the progress of the reaction N2O4(g) ⇌ 2NO2(g) be monitored?

• By measuring the temperature change

• By observing the color change

• By measuring the pressure change

• By analyzing the pH of the solution

Which of the following statements is true about a chemical equilibrium state?

• The concentrations of both reactants and products remain constant

• The reaction stops completely

• The forward reaction rate is faster than the reverse reaction rate

• The temperature increases

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the following best describes the reaction N2O4 ⇌ 2NO2?

• Irreversible reaction

• Exothermic reaction

• Endothermic reaction

• Reversible reaction

What is the significance of the double arrow in the reaction equation N2O4 ⇌ 2NO2?

• It indicates an irreversible reaction

• It represents a catalyst in the reaction

• It shows the direction in which the reaction proceed

• It signifies that the reaction is reversible