Units of atmospheric pressure
The maximum height of mercury, which can be supported by the atmospheric pressure provides a measure of that pressure. A standard pressure of one atmosphere (1 atm) is defined as the pressure that will support a column of mercury of 76 cm height at 0C (density of mercury (13.59..
Composition of atmospheric air
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 the surface of the ea..
A graph shown below is plotted with pressure in atmosphere on y-axis a..
A graph shown below is plotted with pressure in atmosphere on y -axis and volume in m 3 on x -axis. Which of the following holds well? => P V = constant or PV = constant or PV 2 = k or P 2 V 3 = constant..
Ozone (O3)
Ozone (O 3 ) - Ozone is an allotropic form of oxygen. Its molecular formula is O 3 and molar mass is 48 g mol - 1 . Schonbein (1840) concluded that Van Marums observations in 1785 of a peculiar smell, when an electric discharge was passed through oxygen (or air), was in fact a n..
Thermal cracking
Breaking down large molecules by heating at high temperature and pressure is termed as thermal cracking. Thermal cracking is further classified into the following classes. Liquid phase thermal cracking process: The higher boiling fractions e.g., fuel oil, lubricating oil are converted into low b..
Properties
1) Ammonium carbonate is a colourless crystalline solid. 2) It is soluble in water. 3) When exposed to the atmosphere, it undergoes dissociation and hence smells of ammoni..
Significance of Oxygen
Oxygen is the element, which is essential for the life survival system i.e., respiration. Molecular oxygen (O 2 ) combines with atomic oxygen (O) to produce ozone (O 3 ) layer in the atmosphere, which screens off most of the ultraviolet rays entering the earth's atmosphereh..
Oxygen Cycle
Oxygen Cycle - Oxygen is another essential element for living organisms. It is present in large quantities (20.95% v/v) in the atmosphere and is also seen in bound state in water and as oxides and carbonates in rocks. Dissolved oxygen in water is the source of oxygen for aquatic organisms..
Oxides of sulphur
These are acidic, corrosive, poisonous gases that come from combustion of sulphur-bearing fuels such as coal and oil. These gaseous pollutants are released into the atmosphere through volcanic eruptions (natural activity). Man-made sulphur oxide pollutants are produced mainly by industri..
Question 30
Question: Nuclear fusion reactions happens spontaneously in ______. 1. the core of the earth 2. the commercial nuclear reactor 3. the atmosphere of the sun 4. the eruption of a volcano Answer: 3..
Result
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