Description: Practice Class 10 Chemistry Chapter 9 MCQs on Chemical Equilibrium. These important objective questions are based on FBISE exam pattern and include reversible reactions, equilibrium constant, and Le Chatelier’s principle.
1. A reaction in which products can change back into reactants is called:
2. Chemical equilibrium is established in:
3. At equilibrium, the rate of forward reaction is:
4. Which of the following is a reversible reaction?
B) Rusting of iron
C) Explosion of fireworks
D)
5. The equilibrium constant is represented by:
B)
C)
D)
6. Le Chatelier’s principle is used to predict the effect of:
7. Increasing concentration of reactants shifts equilibrium toward:
8. A catalyst affects:
9. The Haber process is used for the manufacture of:
10. Equilibrium is said to be dynamic because:
11. The equilibrium constant for a reaction changes with:
12. Which factor does NOT disturb chemical equilibrium?
13. In the reaction 
, increasing pressure favors:
14. The value of equilibrium constant for a reaction at a given temperature is:
15. Which of the following reactions reaches equilibrium?
16. According to Le Chatelier’s principle, increasing temperature shifts equilibrium toward:
17. In a reversible reaction, products and reactants are present:
18. The equilibrium constant expression for 
is:
![\frac{[A][B]}{[C][D]}](https://mcqs.almcqs.com/wp-content/ql-cache/quicklatex.com-9ce1909a79e6e79531ef3da998f8be68_l3.png "Rendered by QuickLaTeX.com")
B)
![\frac{[A]^a[B]^b}{[C]^c[D]^d}](https://mcqs.almcqs.com/wp-content/ql-cache/quicklatex.com-9630729ad4db7c02a1be3e9cb87bc02c_l3.png "Rendered by QuickLaTeX.com")
C)
![\frac{[C]^c[D]^d}{[A]^a[B]^b}](https://mcqs.almcqs.com/wp-content/ql-cache/quicklatex.com-5933b8d07770d1de4c540aa72c166e6d_l3.png "Rendered by QuickLaTeX.com")
D)
![[A]+[B]+[C]+[D]](https://mcqs.almcqs.com/wp-content/ql-cache/quicklatex.com-498474b4ff5216ee4125c0c7ae86bdd0_l3.png "Rendered by QuickLaTeX.com")
19. If the concentration of products is increased, equilibrium shifts toward:
20. The industrial preparation of ammonia is based on:
21. The equilibrium constant for gaseous reactions in terms of pressure is represented by:
B)
C)
D)
22. Which condition favors the formation of ammonia in Haber process?
23. A catalyst speeds up a reaction by:
24. Which of the following is an example of dynamic equilibrium?
25. The Contact process is used for the manufacture of:
26. In an exothermic reaction, heat is treated as:
27. Equilibrium can only be established when the reaction is:
28. Increasing the concentration of reactants increases the:
29. The state in which the concentration of reactants and products remains constant is called:
30. Which catalyst is used in the Haber process?
31. Decreasing pressure favors the side having:
32. The symbol 
represents:
33. Equilibrium is attained when forward and backward reaction rates become:
34. The process used for the manufacture of sulfuric acid involves equilibrium between:
and 
B)
and 
C)
and 
D)
and 
35. Which process is based on Le Chatelier’s principle?
36. An increase in temperature favors the forward reaction if it is:
37. Which of the following does not affect the equilibrium constant?
38. The equilibrium constant for a reaction with large product concentration is:
39. Which statement is correct about equilibrium?
40. The Contact process involves the reaction:
B)
C)
D)
41. A closed system is necessary for:
42. Increasing the concentration of reactants shifts equilibrium toward:
43. Which of the following is NOT a factor affecting equilibrium?
44. Equilibrium constant depends upon:
45. The backward reaction starts when:
46. Which process is used for manufacturing sulfuric acid?
47. The equilibrium constant for products favored reaction is:
48. Which of the following can shift equilibrium position?
49. At equilibrium, the concentrations of reactants and products become:
50. The principle explaining the shift in equilibrium due to external changes is: