chemistry help for high school students

Pollution of Water - Pollution of the environment is a major global problem of today. It is heartening to note that in the last 25 years or so, scientists and environmentalists have created a great deal of awareness on environment pollution. Several national and international laws and charters and ..

. It causes an increase of the earth's temperature. Remember : If the temperature of the earth's atmosphere gradually rises it will result in melting of the polar ice, and cause the sea level to rise, which, in turn, will result in the flooding of all low lying areas, especially along the sea coast..

Since Haber's process proceeds with a decrease in volume, it is favored by high pressure. In actual practice, a pressure of 200 - 900 atmospheres is employe..

Metals have high tensile strength. Metals can resist stretching without breaking. A strong electrostatic attraction between the positively charged kernels and the mobile electrons surrounding them is the reason for tensile strengt..

In this process, coal is heated in the absence of air to about 1273 - 1473 K. The major products of high temperature pyrolysis are, Coal..

Ionic compounds have high melting and boiling points. A large amount of energy is required to break the crystal lattice, because the ions are held together by strong electrostatic forces of attraction. The variation in melting point depends upon the charges on the ions and ionic radii. T..

The molecule should contain an atom of high electronegativity such as F, O or N bonded to hydrogen atom. The common examples are H 2 O and NH 3..

It possesses excellent electrical insulating character and hence its major use in making electrical goods. Used to make combs, fountain pen barrels, gramophone records, electric goods, formica table tops. Sulphonated bakelites are used as ion exchange resi..

Environmental Chemistry..

Environmental Chemistry..