This blog on Railway RRB General Science notes will help you cover the topic of Air Pollutants: Source and Effects. Questions related to this topic have been repeatedly asked in the Railway RRB Exams – ALP and Group D. The Railway RRB General Science notes provided through our blogs are very important for preparing the General Science section of the Exam Syllabus. So let us begin.
Railway RRB General Science notes – Air Pollutants
|Sulphur dioxide (SO2)||Industries, burning of fossil fuels, forest fires, electric generation plants, smelting plants, industrial boilers, petroleum refineries and volcanic eruptions||Respiratory problems, severe headache, reduced productivity of plants, yellowing and reduced storage time for paper, yellowing and damage to limestone and marble, damage to leather, increased rate of corrosion of iron, steel, zinc and aluminium|
|Carbon monoxide (CO)||Automobile exhaust, biological oxidation by marine organisms, photochemical reactions in the atmosphere, etc.||CO combines with HB and thus reduces the oxygen-carrying capacity of blood resulting into blurred vision, headache, unconsciousness and death due to asphyxiation (lack of oxygen)|
|Carbon dioxide (CO2)||Carbon burning of fossil fuels, depletion of forests||global warming|
|Hydrocarbons Poly-nuclear Aromatic Compounds (PAC)||Automobile exhaust and industries, leaking fuel tanks, leaching from toxic waste dumping sites and coal tar lining of some water supply pipes||Carcinogenic (may cause leukaemia)|
|Poly-nuclear Aromatic Hydrocarbons (PAH)||Automobile exhaust and industries, leaking fuel tanks, leaching from toxic waste dumping sites and coal tar lining of some water supply pipes||Carcinogenic (may cause leukaemia)|
|Chloro-fluoro carbons (CFCs)||Refrigerators, air conditioners, foam shaving cream, spray cans and cleaning solvents||Destroy ozone layer which then permits harmful UV rays to enter the atmosphere|
|Nitrogen Oxides||Automobile exhausts, burning of fossil fuels, forest fires, electric generation plants, smelting plants, industrial boilers, petroleum refineries and volcanic eruptions||Forms photochemical smog, at higher concentrations causes leaf damage or affects the photosynthetic activities of plants and causes respiratory problems in mammals|
|Particulate matter Lead halides||Combustion of leaded gasoline products||Toxic effect in man, respiratory problems|
|Asbestos particles||Mining activities||Asbestosis – a cancerous disease of the lungs|
|Silicon dioxide (SiO2)||Stone cutting, pottery, glass manufacturing and cement industries||Silicosis, a cancerous disease|
|Mercury (Hg)||combustion of fossil fuel & plants||brain & kidney damage|
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That is all from us in this edition of Railway RRB General Science Notes. We hope you make personal notes of the above-provided information on Air Pollutants – Source and Effects. The notes would also prove beneficial for your revision for the exam. All the best.