oxygen composition in air

Composition of Air - For thousands of years, air was considered to be a mixture of many gases. The true composition of air was not known for a long time. Air is a mixture of various gases. The main gases present in air are nitrog..

Air is a mixture of various gases. The main gases present in air are nitrogen (78.1% by volume) and oxygen (20.9% by volume). These two gases together form 99% of the air. Besides these two, air contains small amounts of carbon dioxide (0.03 t..

Gas Relative %age Volume Nitrogen (N 2 ) 78.09 Oxygen (O 2 ) 20.93 Argon (A) 00.93 Carbon di oxide (CO 2 ) 0.032 Miscellaneous 0.02 Total 100.000 Oxygen is present in the first zone, 10 to 12 km from t..

In the dormant condition the seeds respiratory rate is very low and so oxygen is required in very small quantities. But for germination, oxygen is needed in large quantities. The seeds obtain this oxygen from the air contained in the soil. Seeds sown deeply i..

It undergoes spontaneous combustion in air due to strong affinity of boron with oxygen forming boric anhydride...

Air, free from moisture and carbon dioxide, is bubbled through boiling mercury. The oxygen of the air combines with the mercury to form mercuric oxide, which is a red soli..

is a solution of oxygen, nitrogen and carbon dioxid..

Air mainly consists of nitrogen and oxygen. Oxygen and nitrogen gases can be obtained separately by fractional distillation of liquefied air. Nitrogen distils over as vapour at a lesser boiling point (at 77.3 K) and liquid oxygen (at 90 K) is left ..

Air - It is an inexhaustible natural resource. It is very essential for the survival of all the living organisms on earth. In atmosphere, about 95% of the total air is present upto a height of 20 km above the earth's surface. The remaining 5% of air is present up to a ..

It is an inexhaustible natural resource. It is very essential for the survival of all the living organisms on earth. In atmosphere, about 95% of the total air is present upto a height of 20 km above the earth's surface. The remaining 5% of air is present up to a height of ..