JSIERT

Preservatives are the chemicals which maintain the taste for longer time and do not let the food degrade to produce obnoxious (unpleasant smell), e.g. sugar, common salt, sodium benzoate and sodium meta-bisulphate.

Enzymes are the chemicals secreted by our body which react with food water and oxygen as raw material in our mouth and intestines.

Hormones are group of chemicals secreted in our body to control various activities.

Fungicides are the substances which protect crops from fungi, e.g. Bordeaux mixture and sulphur act as fungicides.

Insecticides are the chemical used to kill insects, e.g. B.H.C.