In the second edition, a large number of solved and unsolved problems of latest examination papers of UPTU, KUK, GGSIPU, RGTU have been added at appropriate places. These additions are expected to be of immense use for the students to keep them abreast of the current trends. The book contains a detailed account of the topics of current interests such as Chemical Kinetics, Polymers, Water Treatment, Corrosion, Spectroscopy. We hope that the book in its present form will be more useful to the students of BE/B.Tech of various Indian Universities.