A major of all living organisms is made up of water. Human body has about 65% and some plants have as much as 95% water. It is a crucial compounds for the survival of all life forms. It is a solvent of great importance. The distribution of water over the earth's surface is not uniform…

'' Hydrogen, the most abundant element in the universe and third most abundant on the surface of the globe, is being visualised as the major furture source of energy''. Hydrogen has the simplest atomic structure among all the elements around us in Nature. In atomic form it…

Dry Cleaning of Clothes   Tetra chiroroethene wase earlier used as solvent for dry cleaning. The compound contaiminates the ground water  and is also a suspected carinogen. The process using this compound is now being replaced by a process, were liquefied carbondioxide, with a suitable de…

Introduction It is well known fact that self- sufficiency in food has been achieved in India since late 20th century by using fertilizers and pesticides and exploring improved methods of farming, good quality seeds, irrigation etc. But over exploitation of soil and excessive use of fertil…

About 75% of the solar energy reaching the earth is absorbed by the earth's surface, which increases its temperature. The rest of the heat radiates back to the atmosphere.  Some of the heat is trapped by gases such as carbon dioxide, methane, oxone, chloroflorocarban compounds (CFCs…