Silver tarnish is the discoloration that occurs on silver. Silver is not appreciably affected by dry or moist air that is free from ozone, halogens, ammonia, and sulphur...
Pyrotechnics is the art of making fireworks, which produce different colours when lit. The art involves the intimate mixing of a fuel (burnable material) that is in a...
Chlorine, Iodine and Bromine can be used for disinfecting water but not fluorine because it is too reactive. Chlorine is often chosen simply because it is cheap, readily...
An Internal combustion engine under load develops `pinging’ or `knocking’, where the fuel mixture starts exploding due to compression before the right time, causing rough running, stalling going...
The production of X-ray images depends on the differences between the X-ray absorbing powers of various tissues. This difference in absorbing power is called contrast and is directly...
Zeolites are microporous, aluminosilicate minerals commonly used as commercial adsorbents. Zeolites are widely used in industry for water purification, as catalysts, for the preparation of advanced materials and in...
The approximate composition of ordinary glass is given by the formula, Na2O. CaO.6SiO2. The raw materials required for the manufacture of ordinary glass are sodium carbonate, calcium carbonate...
