Chemical Equilibrium MCQs
Chemical Equilibrium MCQs
Answer these Chemical Equilibrium MCQs and assess your grip on the subject of Chemical Equilibrium. Scroll below and get started!
1: At equilibrium, ________.
A. All chemical reactions have ceased
B. The rates of the forward and reverse reactions are equal
C. The rate constants of the forward and reverse reactions are equal
D. The value of the equilibrium constant is 1
E. The limiting reagent has been consumed
2: Consider the following statement: double alpha[10][5];. the number of components of alpha is ____.
A. 50
B. 30
C. 40
D. 20
3: What is chemical equilibrium?
A. A state in which a chemical reaction has stopped occurring
B. A state in which reactants and products coexist in constant concentrations
C. A state in which a reaction proceeds to completion
D. A state in which reactants are completely consumed
4: What is the condition for chemical equilibrium in a closed system?
A. The rates of the forward and reverse reactions are equal
B. The concentrations of reactants and products are equal
C. The concentration of reactants is zero
D. The equilibrium constant is unity
5: Which factor does not affect the position of equilibrium?
A. Temperature
B. Pressure
C. Catalysts
D. Concentration of reactants
6: What happens to the reaction rate at equilibrium?
A. The reaction rate is zero
B. The reaction rate is constant but not zero
C. The forward and reverse reaction rates are equal
D. The reaction rate continuously increases
7: What is the role of Le Chatelier's principle in chemical equilibrium?
A. It helps determine the equilibrium constant for a reaction
B. It predicts the effect of changes in temperature, pressure, and concentration on the equilibrium position
C. It determines the rate of reaction at equilibrium
D. It quantifies the extent of reaction at equilibrium
8: How does an increase in temperature affect an exothermic reaction at equilibrium?
A. It shifts the equilibrium towards the reactants
B. It shifts the equilibrium towards the products
C. It has no effect on the equilibrium position
D. It slows down the reaction rate
9: What is the effect of adding a catalyst to a reaction at equilibrium?
A. It increases the reaction rate but does not affect the equilibrium position
B. It shifts the equilibrium towards the reactants
C. It has no effect on the reaction rate or equilibrium position
D. It shifts the equilibrium towards the products
10: How does an increase in pressure affect the equilibrium of a gaseous reaction?
A. It has no effect on the equilibrium position
B. It shifts the equilibrium towards the side with fewer moles of gas
C. It shifts the equilibrium towards the side with more moles of gas
D. It increases the reaction rate at equilibrium
11: What is the relationship between the equilibrium constant (Kc) and the reaction quotient (Qc)?
A. Kc is always greater than Qc at equilibrium
B. Kc and Qc are equal at equilibrium
C. Kc is the ratio of products to reactants at equilibrium, while Qc represents the ratio of products to reactants at any point in the reaction
D. Kc is a measure of the reaction rate, while Qc represents the equilibrium position
12: How can you shift the equilibrium of a reaction towards the products?
A. By increasing the concentration of reactants
B. By decreasing the temperature
C. By removing some of the products
D. By removing some of the reactants
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Chemical Equilibrium MCQs
