Electronic Theory of Valency: G.N. Lewis explained valency, in terms of interaction between extra nuclear electrons of the combining atoms. It was ...

Phosphorus Cycle plays a vital and indispensable role in living organisms. Phosphorus in the form of phosphates are necessary for the growth and maintenance ...

Oxygen Cycle is the second most abundant element in the atmosphere and is present to the extent of about 21 per cent and is essential for all life processes. ...

Biogas, as you know is a source of energy for cooking. Using a simple process, cattle dung is used to produce a gas (called biogas) that contains 55-70 per ...

Hydro-energy Hydro-energy is the cheapest, and cleaner and hence the best source of energy. Water power is developed by allowing water to fall under ...

Solar energy is the most readily available abundant source. It is free as it does not belong to anybody. It is also non-polluting. Solar energy has the ...

Chernobyl Disaster. The worst nuclear accident in history occurred on April 26, 1986 at the 1000 megawatt Reactor IV at the multiunit Chernobyl Power ...

Biochemical Effects of Arsenic:  The insecticides, fungicides and herbiacides contain arsenic. Among the compounds of arsenic, those of As (III) are most ...

Global Warming An increase in the average temperature of the earth’s atmosphere due to green house effect which can have far reaching effects on the ...

Disposal of Industrial Waste and Treatment of Organic Impurities. Waste is produced in all countries. The amount of wastes to be managed is enormous. ...

Water Conservation There has been a considerable increase in the consumption a water over the years. It is therefore in the interest of mankind to ...

The principle of Atomic Absorption Spectroscopy(AAS) is the conversion of the sample to be analysed into atomic vapor state followed by measurement of the ...