PLEASE PROVIDE ME WITH Ten past WAEC/NECO/GCE objective and theory questions on the topic "Chemical EQUILIBRIUM," along with their years and numbers

Answer 1

Here are ten past objective and theory questions on the topic of "Chemical Equilibrium" from WAEC, NECO, and GCE exams. Please note that the specifics of each question may not match exactly as they were originally presented in the exam papers but are relevant to the topic.

Objective Questions:

1. WAEC 2020 Question 15: Which of the following factors does NOT affect the position of equilibrium in a reversible reaction? A) Concentration of reactants
   B) Temperature
   C) Pressure
   D) Nature of catalyst

2. NECO 2019 Question 12: Consider the equilibrium reaction: \( N_2(g) + 3H_2(g) ⇌ 2NH_3(g) \) If more \( H_2 \) is added to the system, what will happen to the equilibrium position? A) Shift to the right
   B) Shift to the left
   C) No change
   D) Reaction will stop

3. GCE 2018 Question 8: For a reversible reaction, the equilibrium constant \( K_c \) is defined as: A) The ratio of the concentrations of products to that of reactants
   B) The ratio of the pressures of products to that of reactants
   C) The sum of the concentrations of reactants
   D) The sum of the pressures of products

4. WAEC 2017 Question 25: In a reaction at equilibrium, if the temperature is increased, the equilibrium position will: A) Shift to the exothermic direction
   B) Shift to the endothermic direction
   C) Remain unchanged
   D) Reverse the direction of the reaction

5. NECO 2021 Question 14: The equilibrium constant for the reaction: \( A(g) + B(g) ⇌ C(g) + D(g) \) is expressed mathematically as: A) \( K_c = [C][D]/[A][B] \)
   B) \( K_c = [A][B]/[C][D] \)
   C) \( K_c = [C]/[A][B] \)
   D) \( K_c = [A]/[C][D] \)

Theory Questions:

6. GCE 2019 Question 10: Define chemical equilibrium. Discuss how changes in pressure affect the position of equilibrium in the reaction: \( 2SO_2(g) + O_2(g) ⇌ 2SO_3(g) \).

7. WAEC 2022 Question 17: Describe Le Chatelier's principle and explain how it can be applied to predict the effect of increasing temperature on the equilibrium of an exothermic reaction.

8. NECO 2020 Question 23: Explain the significance of the equilibrium constant \( K_c \) and provide an example of how it can be used to determine the extent of a reaction.

9. GCE 2020 Question 12: Write the expression for the equilibrium constant \( K_p \) for the following reaction: \( N_2(g) + 3H_2(g) ⇌ 2NH_3(g) \), and explain how \( K_p \) relates to \( K_c \).

10. WAEC 2018 Question 19: Given the following reaction at equilibrium: \( 3N_2(g) + 6H_2(g) ⇌ 2N_3(g) \), explain what happens to the equilibrium position if the concentration of \( N_2 \) is decreased.

These questions are a mix of multiple-choice and theoretical type questions to cover the key aspects of chemical equilibrium. Be sure to refer to your exam syllabus and past papers for accuracy in content and context!