Theories of Covalent Bonding and Shapes of Molecules

Chemistry, HSSC-KPK First Year. This chapter is split into 30 topics and has 699 practice questions. The topics covered are listed below, followed by 10 free sample questions from the chapter.

Topics in this chapter

1. Covalent bonding & Lewis electron-pair theory 25 questions
2. VSEPR theory & shapes of molecules 25 questions
3. Resonance & resonating structures 25 questions
4. Valence bond theory, sigma & pi bonds 25 questions
5. Hybridization: sp3, sp2 & sp 25 questions
6. Molecular orbital theory & bond order 25 questions
7. Bond energy & bond length 25 questions
8. Ionic character & dipole moment 25 questions
9. Bonding effects on properties & types of solids 25 questions
10. VSEPR theory: electron pairs and postulates 30 questions
11. Predicting molecular shapes with VSEPR theory 24 questions
12. Table 3.1 electron pair arrangements and molecular shapes 22 questions
13. Bond angles of simple molecules and their reasons 20 questions
14. Electronic configurations of central atoms in VSEPR examples 20 questions
15. Valence bond theory: assumptions and orbital overlap 26 questions
16. Counting sigma and pi bonds in molecules 20 questions
17. Need for hybridization: ground and excited states of carbon 20 questions
18. Hybridization states of atoms in molecules 22 questions
19. Ethene and ethyne: orbital picture, bond lengths and angles 23 questions
20. Energy diagrams of sp3, sp2 and sp hybridization (Figures 3.19-3.24) 22 questions
21. Molecular orbital theory: orbitals and diagrams 30 questions
22. Bond order calculations from molecular orbital configurations 21 questions
23. Bond energy: calculations and trends with experimental data 22 questions
24. Bond length: radii, experimental values and shortening in polar bonds 20 questions
25. Ionic character from electronegativity differences 20 questions
26. Dipole moment calculations and units 20 questions
27. Dipole moment: polar molecules, measurement and applications 30 questions
28. Hair keratin: hydrogen bonds and disulphide bonds (STS) 22 questions
29. Resonance: ozone and benzene structures in detail 20 questions
30. Valence bond description of HCl, H2O and N2 molecules 20 questions