Petroleum is a complex of hydrocarbons, mostly alkanes and cycloalkanes. It occurs deep below earth's crust entrapped under rocky strata. It is taken out by drilling wells. The natural oil thus derived is a viscous black liquid. In its taken out by drilling wells Petroleum ( Latin, …

Proteins have defined three-dimensional structure.   There are a number of factors which determine the exact shape of a protein. These are a number of factors which determine  the exact shape of a protein. There are consider in terms of four levels of structural organisation called the pr…

Margarine, a substitute for butter, is manufactured in U.S.A, UK and other European countries in large quantities by the hydrogenation of vegetable oils and soft fats (Norman, 1902). And India 'Vanaspati' or 'Vegetable ghee' was first introduced after the first Word War …

It is well known fact liquids assume the shape of the container. Why is then small drops of mercury form sperical bead instead of spreading on the surface. Why do particles of soil at the bottom y river remain separated but they stick together whey taken out?  Why does a liquid rise (or…

If an evacuated container is partially filled with a liquid, a portion of liquid evaporates to fill the remaining volume of the container with vapour. Initially the liquid evaporates and vapour. Initially the liquid evaporates and pressure exerted by vapours on the walls of the containe…