Structure of Molecules

Chemistry, SSC-KPK Class 9. This chapter is split into 64 topics and has 1,551 practice questions. The topics covered are listed below, followed by 10 free sample questions from the chapter.

Topics in this chapter

1. Valence Concept: Octet and Duplet Rules 30 questions
2. Properties of Covalent Compounds 26 questions
3. Ionic Compounds: CaCl2, MgO and Other Examples 28 questions
4. Chemical Bond and Why Atoms Form Bonds 30 questions
5. Double and Triple Covalent Bonds 30 questions
6. Hydrogen Bonding 29 questions
7. Covalent Bond: Sharing of Electrons 27 questions
8. Properties of Metals 28 questions
9. Properties of Ionic Compounds 30 questions
10. Polar and Non-polar Covalent Bonds 29 questions
11. Shapes of Molecules 30 questions
12. Single Covalent Bond: Cl2, HCl, CH4 and Electron Dot Diagrams 30 questions
13. Metallic Bond and Electron Sea Model 30 questions
14. Co-ordinate Covalent (Dative) Bond 30 questions
15. Orbital Concept, Valence Electrons and Types of Bonds 28 questions
16. Comparing Ionic, Covalent, Dative and Metallic Bonds 29 questions
17. Ionic Bond: Definition and Formation of NaCl 28 questions
18. Lewis Structures 30 questions
19. Chapter Review: Structure of Molecules 29 questions
20. Intermolecular Forces and Dipole-Dipole Interactions 30 questions
21. Noble Gas Electronic Configurations (Fig. 4.1) 21 questions
22. Valence Electrons and Bonding Tendency of Elements 27 questions
23. Valence Shell, Bonding and Non-bonding Electrons 20 questions
24. Formation of Na+ and Cl- Ions (Fig. 4.2) 23 questions
25. Formation of Cations and Anions: Electron Counting 27 questions
26. Formation of Calcium Chloride (Fig. 4.3) 20 questions
27. Writing Formulas of Ionic Compounds 23 questions
28. Isoelectronic Ions and Noble Gas Configurations 23 questions
29. Uncombined Atoms, Molecules and Ions (Example 4.2) 22 questions
30. Classifying Covalent and Ionic Substances (Activity 4.1) 21 questions
31. Ionic Bond Test Yourself and Exercise Applications 20 questions
32. Hydrogen Molecule and Localized Electrons (Fig. 4.4) 20 questions
33. Electron Dot and Cross Diagrams (Example 4.1) 21 questions
34. Chlorine Molecule (Fig. 4.6) 21 questions
35. Methane Molecule (Fig. 4.7) 22 questions
36. Oxygen Molecule and the Double Bond (Fig. 4.8) 20 questions
37. Carbon Dioxide Molecule (Fig. 4.9) 21 questions
38. Nitrogen Molecule and the Triple Bond (Fig. 4.10) 20 questions
39. Counting Bond Pairs and Lone Pairs in Molecules 26 questions
40. Electronegativity Difference and Bond Type (1.7 Rule) 22 questions
41. Predicting Bond Type from the Elements Involved 24 questions
42. Society, Technology and Science: Adhesives (Glue) 20 questions
43. Ammonium Ion Formation (Fig. 4.11) 23 questions
44. Addition Compound of NH3 and BCl3 (Fig. 4.12) 22 questions
45. Donor and Acceptor Species in Dative Bonding 20 questions
46. Lewis Structure of Water and Hydrogen Sulphide (Fig. 4.13, Example 4.3) 21 questions
47. Test Yourself Table: Lewis Structures and Bond Types of Ten Compounds 24 questions
48. Non-polar Bonds in H2, Cl2 and Br2 (Fig. 4.14) 20 questions
49. Polar Covalent Bond in HCl (Fig. 4.15) 21 questions
50. Polar Bonds in H2O and NH3 (Fig. 4.16) 21 questions
51. Polar versus Non-polar Bonds: Exercise Applications 23 questions
52. Metal Lattice and Delocalized Electrons (Fig. 4.17) 20 questions
53. Activity 4.3: Ionic, Covalent and Metallic Substances Around Us 20 questions
54. Bond Angles and Molecular Shapes (Fig. 4.18) 24 questions
55. Matching Molecular Shapes with Bonding and Polarity 21 questions
56. Strength of Intermolecular Forces versus Covalent Bonds 23 questions
57. Dipole-Dipole Interaction in HCl (Fig. 4.19) 20 questions
58. Hydrogen Bonding in Water (Fig. 4.20) 20 questions
59. Hydrogen Bonding: Examples, Properties and Applications 26 questions
60. Society, Technology and Science: Epoxy Adhesives 20 questions
61. Melting Points of Ionic Compounds and the Use of MgO 21 questions
62. Activity 4.4: Properties of Metals and Their Uses 23 questions
63. Ionic versus Covalent Compounds: Property Comparison 30 questions
64. Lewis Structures of CO, HCl, SO2, CCl4, BF3 and NH3 23 questions