preparation and properties of oxygen

Metals such as silver, gold and platinum adsorb oxygen gas at 500 o C. Molten silver absorbs ten times its mass of oxygen and expels it rapidly on cooling. This phenomenon is called the spitting of silve..

Oxygen (dioxygen) is neutral and has no action towards blue or red litmus. It is a supporter of combustion. Oxygen is quite a stable compound due to high bond (dissociation) energy of O = O bond. Its bond energy is 495 kJ mol - 1 . So,..

Physical Properties of Oxygen - Color-odor-Taste Oxygen is colorless, odorless and a tasteless gas. Density It is slightly denser than air. Vapor Density of oxygen = 16 (Vapor density of air = 14.4) Experiment to show that oxygen is denser than air ..

. Although the solubility of oxygen in water is only 4% at STP, it is enough for fish and other aquatic animals and plants to breathe. Remember : STP = Standard temperature and pressure. Temperature = 0 o C Pressure = 76 cm or 760 mm of mercur..

Color-odor-Taste : Oxygen is colorless, odorless and a tasteless ga..

With sodium Introduce a small piece of sodium metal into a jar of oxygen. It combines with oxygen to form sodium peroxide. Allow a piece of sodium to burn in a deflagrating spoon, and then introduce it into another jar of oxygen. It burns with a brilliant ..

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..

a) With hydrogen - Hydrogen burns in oxygen to form water vapor. A jet of hydrogen is burnt in oxygen, in an inverted funnel, as shown in figure (Fig.13.10). The product obtained, is sucked out through a test tube, kept immersed in cold water. The vapor condenses in the test tub..

1) It is soluble in hot water. 2) It is in the form of purple crystals. 3) On heating KMnO 4 decomposes to potassium manganate and oxygen...

1) Ammonium sulphate is a colourless crystalline solid. 2) It is soluble in water to a great extent. The solubility of this salt in water is 78 g at 30 o C. 3) When dissolved in water it absorbs heat and causes coolin..