Prior to World War II, many naturally occurring chemicals such as nicotine ( by planting tobacco plants in the crop field), were used as pest controlling substances for major crops in agricultural practices. During World War II, DDT was found to be of great use in the control of malaria…
The study of Chimestry is very important as it's domain encompasses every sphere of life. Chemists study the properties and structure of substances and the changes undergone by them. All substances contain matter which can exist in three states- solid, liquid or gas. The constituent…
Atoms are the building blocks of elements. They are the smallest parts of an element that chemically react. The first atomic theory, proposed by John Dalton in 1808, regared atom as the ultimate indivisible particle of matter. Towards the end of the nineteenth century, it was proved exp…
This equilibrium can be better understood if we consider the example of a transparent box carrying a U - tube with mercury ( manometer). Drying agent like anhydrous calcium chloride (or phosphorus penta - oxide) is placed for a few hours in the box. After removing the drying agent by t…
Heterocyclic Compounds are those cyclic compounds in which one or more of the ring carbons are replaced by another atoms. The non- carbon atoms in such rings are referred to as hetero atoms. The most common hetero atoms are nitrogen, oxygen and sulphur, but other atoms such as boron, ph…
