The earth is unique in the solar system for the enormous quantity of water. It is said as liquid of life and is the essence of all living processes. Water is the most vital resource for all kinds of life as it forms a medium in which physical and chemical transformations especially those of biological significance takes place and is considered as precious component on the earth. This unique component of nature plays an important role in life from molecules to man. The water is a universal solvent as it dissolves more substances than any other liquid without undergoing any chemical change and...