Chemistry plays an important part in all of the other natural sciences, basic and applied. Plant growth and metabolism, the formation of igneous rocks, the role played by ozone in the atmosphere the establishment of the forensic evidence. Chemistry is the study of the nature, properties, and composition of matter. When natural science (the systemic Knowledge of nature) seemed quite clearly divisible into the physical and biological sciences, with the former being comprised of physics, chemistry, geology and astronomy and the latter consisting of botany and zoology. The emergence of important field to study such as oceanography pale botany, meteorology, pharmacy and biochemistry, have made it increasingly clear that the dividing lines between the sciences are no longer at all sharp. This textbook also caters to the requirement of the syllabus prescribed by various universities for undergraduate and postgraduate students pursuing these courses.