White phosphorus is an extremely reactive element. White phosphorus ignites spontaneously in chlorine and reacts violently with the halogens.... View Article
In chemistry, the mole is a fundamental (SI) unit used to measure the amount of substance. This quantity is sometimes referred to as the chemical... View Article
Compounds are represented by chemical formulas. A chemical formula shows the elements that make up the compound and the numbers of atoms of each... View Article
The incident ray AB and the refracted ray BC and the perpendicular of B to the surface separating the two media Mo and M1 lie in the same plane.... View Article
The minimum retarding means the negative potential of the anode of a photoelectric tube for which photoelectric current stops or becomes zero is... View Article
Non-metals are minerals which, as a rule, do not serve as a raw material for the extraction of metal. Some of the uses of non-metals are listed... View Article
The ratio of the speed of light in a vacuum to the speed of monochromatic light in the substance of interest. Also called the absolute index of... View Article
As the minerals are exhaustible and non-renewable natural resources, their exploitation has to be done systematically and scientifically for... View Article
Answer: Light green The ferrous sulphate crystals are light green. Ferrous sulphate is also obtained as a by-product in the manufacture of... View Article
Soda-lime is a granular solid produced by slacking quicklime (CaO) with a concentrated solution of sodium hydroxide, NaOH(aq). In chemical... View Article
Acute diseases are diseases which last for short periods of time. An example of an acute disease would be the common cold. Chronic diseases are... View Article
(i) enzymes are biocatalysts that help the reactions in the bodies of living things to proceed under relatively mild conditions. Enzymes are... View Article
(i) Hydraulic Washing: in this procedure, the ore is first powdered. A stream of water running in an upward direction is now used to wash the ore... View Article
Answer: (i) Distillation - in order to obtain the pure metal as a distillate, the impure metal block is evaporated. This method can be used for... View Article
A chemical compound that can be added to liquids or gases and used to decrease the corrosion rate of a given material (usually a metal) can be... View Article
Placement of Electrical Insulation between the two Metals to stop the flow of electrons between them and prevent galvanic coupling. Usage of a... View Article
When two metals having differing electrode potentials are in contact with each other in the presence of an electrolyte, one metal acts as a... View Article
Pitting corrosion is a type of corrosion that attacks a local area of the metal and eventually leads to the formation of holes in the metal.... View Article
Corrosion can lead to the loss in purity of the metal. Some important properties of the metal might also be lost due to corrosion. For example,... View Article
The spontaneous destruction of metals as a result of the interaction with the environment mainly oxygen is called corrosion. This happens because... View Article
