Hello Ganesh!
The chapter Chemical Bonding is all the more important because the concepts taught in the chapter are used all along in chemistry. You will not find a single place where the concepts of chemical bonding are not used. Thus, the important topics include, VBT, MOT, VSEPR Theory, Dipole moment, Lattice energy, bond angle, bond order, bond lenth, hydrogen bonding, ionic bonds, covalent bonds, and each and every topic in the chapter. Hope this helps.
All the best.