Welcome to the Chemical Equilibrium MCQs with Answers, it helps learners quickly identify areas for improvement in Chemical Equilibrium Online Test.
| Chemical equilibrium is a crucial concept in chemistry, describing the state in which the forward and reverse reactions in a reversible reaction proceed at equal rates. This dynamic balance occurs when the concentrations of reactants and products remain constant over time, though the reactions continue to occur.
In a chemical equilibrium quiz, MCQs on chemical equilibrium typically cover essential aspects of this phenomenon. Equilibrium constant multiple choice questions focus on understanding and calculating the equilibrium constant KeqK_\text{eq}, which quantifies the extent of a chemical reaction at equilibrium. Le Chatelier’s principle MCQs explore how systems at equilibrium respond to changes in temperature, pressure, or concentration. This principle predicts shifts in equilibrium to counteract disturbances, influencing reaction outcomes. Reaction equilibrium exam questions delve into factors affecting equilibrium, including the effect of catalysts, changes in temperature, and alterations in reactant or product concentrations. Dynamic equilibrium MCQs highlight the dynamic nature of equilibrium, emphasizing that while concentrations remain constant, molecular movement and reaction rates continue. |
Chemical Equilibrium Online Quiz
By presenting 3 options to choose from, Chemical Equilibrium Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Chemical Equilibrium Questions and Answers and click over the correct answer.
- Test Name: Chemical Equilibrium MCQ Quiz Practice
- Type: Quiz Test
- Total Questions: 40
- Total Marks: 40
- Time: 40 minutes
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Chemical Equilibrium Flashcards
In a __________ reaction, the rate of the forward reaction equals the rate of the reverse reaction.
Reversible
The equilibrium constant expression for the reaction: 𝑎𝐴+𝑏𝐵⇌𝑐𝐶+𝑑𝐷aA+bB⇌cC+dD is: 𝐾𝑐=[𝐶]𝑐[𝐷]𝑑[𝐴]𝑎[𝐵]𝑏Kc=[A]a[B]b[C]c[D]d. What does [A] represent?
Reactant concentration
What happens to the equilibrium constant (𝐾𝑐Kc) for a reaction when the reaction is reversed?
Remains the same
At equilibrium, the rate of the forward reaction is _______ the rate of the reverse reaction.
Equal to
The equilibrium constant (𝐾𝑐Kc) for the reverse reaction is the _______ of the equilibrium constant for the forward reaction.
Inverse
If a reaction is at equilibrium and then the concentration of a reactant is increased, the equilibrium will shift _______ to counteract the change.
Right
Which of the following would increase the equilibrium constant (𝐾𝑐Kc) for a reaction?
Decreasing the temperature
A catalyst affects the rate of reaction but does not affect the _______ of the reaction.
Equilibrium constant
In the equation: 𝑁2(𝑔)+3𝐻2(𝑔)⇌2𝑁𝐻3(𝑔)N2(g)+3H2(g)⇌2NH3(g), if the concentration of 𝑁2N2 is increased, the equilibrium will shift _______.
Right
Which of the following statements is true for an endothermic reaction at equilibrium?
Increasing the temperature shifts the equilibrium to the left
In a reaction at equilibrium, the rate of the forward reaction is _______ the rate of the reverse reaction.
Equal to
The equilibrium constant (𝐾𝑐Kc) for the reaction: 𝐴+𝐵⇌𝐶+𝐷A+B⇌C+D is 25. What does this indicate about the reaction at equilibrium?
The reaction is product-favored
Which statement about equilibrium constants is true?
A larger 𝐾𝑐Kc value indicates a greater concentration of products at equilibrium
In a reaction mixture at equilibrium, if the volume is increased, the pressure will _______.
Decrease
Which of the following factors affects only the rate of reaction and not the position of equilibrium?
Catalyst
If the concentration of a reactant is decreased at equilibrium, the equilibrium will shift _______ to counteract the change.
Right
For the reaction: 2𝑁𝑂2(𝑔)⇌𝑁2𝑂4(𝑔)2NO2(g)⇌N2O4(g), if the concentration of 𝑁2𝑂4N2O4 is increased, the equilibrium will shift _______.
Right
What effect does adding an inert gas to a reaction mixture at constant volume have on the equilibrium?
No effect
Which of the following statements is true regarding the equilibrium constant expression?
The coefficients in the balanced equation become the exponents in the expression
What is the effect of adding a catalyst to a reaction mixture at equilibrium?
Increases the rate of the forward and reverse reactions equally
For the reaction: 2𝑆𝑂2(𝑔)+𝑂2(𝑔)⇌2𝑆𝑂3(𝑔)2SO2(g)+O2(g)⇌2SO3(g), if the concentration of 𝑆𝑂3SO3 is decreased, the equilibrium will shift _______.
Right
What is the effect of increasing the pressure on a gaseous reaction mixture at equilibrium?
Shifts the equilibrium to the side with fewer moles of gas
If the concentration of a product is increased at equilibrium, the equilibrium will shift _______ to counteract the change.
Right
In the equation: 2𝐻2(𝑔)+𝑂2(𝑔)⇌2𝐻2𝑂(𝑔)2H2(g)+O2(g)⇌2H2O(g), if the pressure of 𝐻2H2 is increased, the equilibrium will shift _______.
Right
What happens to the equilibrium constant (𝐾𝑐Kc) for a reaction when the temperature is increased?
Increases
The equilibrium constant (𝐾𝑐Kc) for a reaction at a certain temperature is 1.5. What does this indicate about the reaction?
The products are favored at equilibrium
In a reaction mixture at equilibrium, if the pressure is increased, the volume will _______.
Decrease
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