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Corrosion of metals can be prevented if the contact between metal and air is cut off. This is done in a number of ways.

Sugar is the most common sweet carbohydrate used all over the world. There are many varieties of sugar, but only a few are included, to a considerable extent, in our diet.

Fertilizer is one of the major methods of advanced agricultural practices and the use of fertilizers increases the crop yields and restores the lost soil fertility.

The articles subject to wear and tear in the course of use are thrown out. These wastes may be from the articles of domestic or agricultural use or from mining.

Rain, fall’s, the main source of water and it is reserved by other resources such surface water and ground water.

Noise means unpleasant sound that causes discomfort. So noise pollution is referred as an unwanted sound that causes discomfort, disturbances and irritation

The pollution of air due to different causes such as industrial chimney wastes, pollutants from thermal power stations, automobiles etc. polluted the air and affect health of the organisms.

Pollution is undesirable changes in the physical, chemical or biological characteristics of air, water and soils that may harmfully affects the life and create health hazards of any living organism.

Pollution is an undesirable change in the physical, chemical or biological characteristics of air, water and soil that harmfully affect the life and creates health hazards of living organisms.

A mineral from which a metal can be extracted conveniently and profitably is called on ore.

There are 22 elements which are non-metals. Of these 11 exist as gas, 10 as solids and only one, i.e., bromine occurs as fluid at room temperature.

If you look around yourself, you will find a variety of objects. Have you ever though as to how and with what these objects around us are made of?

Just as a symbol represents one atom of an element, a chemical formulate represents the number of atoms of each element in one molecule of a compound.

Slang is a colloquial speech not generally acceptable in formal usage. It generally expresses a abrasive, sometimes offensive, no-nonsense attitude and lends itself to poking fun at pretentiousness.

The Bermuda Triangle is a region in the world, which is located to the south-east of the United States and for years so many ships and planes have lost while trying to pass through it.

An undesirable change in the physical, chemical or biological characteristics of air is called air pollution.