preparation of oxygen from air

On a laboratory scale - 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 solid (Fig.13.1..

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...

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 is an inexhaustible natural resource, essential for the survival of all the living organisms on earth. Air is a mixture of different gases; nitrogen and oxygen are the major component..

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 about ..

Air - Air is an inexhaustible natural resource, essential for the survival of all the living organisms on earth. Air is a mixture of different gases; nitrogen and oxygen are the major components. Air present in atmosphere consists of 78% nitrogen 21..

It forms an explosive mixture with air, oxygen or nitric oxide. 2CS 2 + 6O 2 2CO + 4SO 2 + 5N 2..

Chemical Properties of Sulphur - With Air or Oxygen - When heated in air or oxygen, sulphur first melts and then burns with a blue flame to form sulphur dioxide and some traces of sulphur trioxid..