Water Pollution Based on source of pollution, the following types of water pollution are recognised Water pollution due to city […]
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SOURCES AND TYPES OF WATER
In the Earth’s biosphere, water is essential to all forms of life. Interestingly, it is also the biospheres most abundant […]
Tin does not occur naturally as a free element. The main source is the mineral cassiterite or tin stone, SnO2. In […]
Tin and Copper
Tin Tin does not occur naturally as a free element. The main source is the mineral cassiterite or tin stone, […]
Calcium and Aluminium
Calcium Calcium is too reactive to occur as a free metal in nature. It occurs abundantly in the combined state […]
Metals Physical Properties of Metals The physical properties of elements are dependent on the arrangement of their atoms or molecules […]
Carbohydrates
Carbohydrates (saccharides) – Molecules consist of carbon, hydrogen and oxygen atoms. It is a major food source and a key […]
Polymers – Plastics
Polymers are giant molecules which are formed by joining together a large number of much smaller molecules thus, forming a […]
Amino Acids
Amino acids are the basic structural units of proteins. Amino acids are organic compounds which contain both an amino group and a […]
Fats and Oils
Fats and Oils Fats and oils are naturally-occurring esters of three long carboxylic acids called fatty acid with a special type of alcohol called glycerol ( propane- […]