Chemical Equilibrium

Chemistry, HSSC-KPK First Year. This chapter is split into 45 topics and has 1,191 practice questions. The topics covered are listed below, followed by 10 free sample questions from the chapter.

Topics in this chapter

1. Solubility product & precipitation 29 questions
2. Common ion effect 30 questions
3. Le Chatelier's Principle — effect of pressure and volume 28 questions
4. Law of Mass Action & equilibrium constant Kc 29 questions
5. Le Chatelier's Principle — effect of concentration 28 questions
6. Le Chatelier's Principle — effect of temperature and catalyst 29 questions
7. Reversible reactions & dynamic equilibrium 29 questions
8. Kp, Kx, Kn and their relationships 29 questions
9. Reaction quotient Qc & predicting direction/extent of reaction 29 questions
10. Writing Kc expressions for given reactions 30 questions
11. Units of Kc and Kp for gaseous reactions 30 questions
12. Delta n and the Kp-Kc relationship for different reactions 27 questions
13. Kp and Kc interconversion calculations 30 questions
14. Kc from equilibrium moles and vessel volume 30 questions
15. Kc from equilibrium masses per dm3 (Example 7.1 type) 25 questions
16. Mole fractions, partial pressures, Kx and Kn calculations 30 questions
17. Reaction quotient numericals and predicting direction 30 questions
18. Comparing Qc and Kc to decide the direction of change 22 questions
19. Extent of reaction and percentage conversion from Kc 25 questions
20. ICE table: H2 + I2 equilibrium from equal amounts 29 questions
21. ICE table: dissociation and unequal-amount problems 28 questions
22. Finding an unknown equilibrium concentration from Kc 30 questions
23. Kc for reversed, multiplied and combined equations 24 questions
24. Rate constants and equilibrium: Kc = kf/kr 27 questions
25. Degree of dissociation, Kp and Kc of dissociating gases 24 questions
26. Writing Ksp expressions for sparingly soluble salts 26 questions
27. Solubility from Ksp: calculations for different salt types 24 questions
28. Ksp from solubility: calculations for different salt types 25 questions
29. Precipitation: mixing solutions and comparing IP with Ksp 30 questions
30. Minimum ion concentration to start precipitation and selective precipitation 26 questions
31. Solubility in the presence of a common ion: calculations 26 questions
32. Le Chatelier's principle: concentration changes in named equilibria 30 questions
33. Le Chatelier's principle: pressure and volume changes in named equilibria 24 questions
34. Le Chatelier's principle: temperature, enthalpy change and Kc 26 questions
35. Catalyst: activation energy, rate and equilibrium 20 questions
36. Haber process: conditions and reasoning 24 questions
37. Formation of SO3 for sulfuric acid: conditions and reasoning 20 questions
38. Exercise questions of Unit 7: multiple choice and short questions 23 questions
39. Common ion effect: qualitative examples and applications 30 questions
40. Assertion-reason questions on chemical equilibrium 29 questions
41. Chromate-dichromate equilibrium (Unit 7 project) and colour changes 20 questions
42. Physical equilibria and Le Chatelier's principle in everyday life 20 questions
43. Concentration-time graphs and rate profiles of reversible reactions 20 questions
44. Classifying equilibria as homogeneous or heterogeneous 25 questions
45. Yield and volume calculations for ammonia and SO3 equilibria 22 questions