Most of the properties of the elements such as atomic volume, atomic size, ionization enthalpy, electron affinity and electronegativity are directly related to the electronic
Category: Chemistry
THE NEED FOR CLASSIFICATION OF ELEMENTS Before the beginning of eighteenth century, only a very few elements were known and it was quite easy to
AMINES It has a functional group of NH2. GENERAL MOLECULAR FORMULAR/STRUCTURE It has a general molecular formula of RNH2 or structure of R – N
Carbohydrates are naturally occurring organic compounds containing carbon, hydrogen and oxygenwith oxygen in the ratio 1:2 as in water. The general molelcular formula of carbohydrates
NATURAL AND SYNTHETIC POLYMERS Polymerisation (addition and condensation) plastics. Thermosplastic and thermosetting polymers, resins. Polymer is the final product, macromolecule of high molecular
Sources, properties and uses detergents and soaps Structure, their mode and action. Fats and oils belong to a general group of compounds known as lipids.
ALKANOATES General molecular formula, nomenclature, preparation, properties and uses. SOURCES The alkanoic acid or carboxylic acids are also called fatty acids because some of
SOURCES OF ALKANOLS – From destructive distillation wood. – From starchy food and sugar General molecular formular Alkanol is a homologous series with general
Benzene: Benzene is a typical aromatic compound with molecular formula of C6H6. It has the structure of: Preparation From coal tar: The destructive distillation of
Alkynes are the homologous series of unsaturated hydrocarbon with a general molecular formua CnH2n-2. Alkynes show a high degree of unsaturation than alkenes, hence,t hey
UNSATURATED HYDROCARBONS These are hydrocarbons in which carbon atoms join with each other by multiple bonds. The multiple bond can be double bonds e.g Alkene
Saturated Hydrocarbons Saturated hydrocarbons are hydrocarbons consisting of carbon chains with single bond between them in which carbon joins with another carbon by single covalent
Definition of Simple Machine A machine is a tool or device that makes work easier. It is defined as a tool which uses force applied
Percentage of Oxygen in Air We have read that Air consists mainly of molecules of oxygen and nitrogen with important yet trace amounts of other
WHAT IS ACIDS, BASES AND INDICATORS? All the elements in nature fall into three classes: metals, non-metals and gases. Non-metals are also sometimes called metalloids.
EVAPORATION AND BOILING (LIQUID TO GAS) On heating particles gain kinetic energy and move faster. In evaporation and boiling the highest kinetic energy molecules can
Chemists are the people who transform the everyday materials around us into amazing things. Some chemists work on cures for cancer while others monitor the
Sodium Carbonate (Na2CO3) Popularly known as washing soda or soda ash, sodium carbonate is a commercially important compound. In earlier days, it was obtained from
What is Carbon monoxide?. Carbon monoxide is an odourless, tasteless and colourless gas, which is insoluble in water. It is extremely poisonous. Under no circumstances