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Environmental Chemistry
What do you mean by Biochemical Oxygen Demand (BOD)?
BOD (Biochemical Oxygen Demand): BOD stands for biochemical oxygen demand. It is a measure of the dissolved oxygen that would be needed by the microorganism to oxidise some of the inorganic and organic compounds present in the polluted water. BOD, therefore, is a measure of the contamination caused by the totality of these compounds which can be oxidised in the presence of micro-organisms. The BOD is taken as the measure of water quality. Clean water has BOD value of less than 5 ppm whereas highly polluted water has BOD value of 17 ppm or more.
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What is environment?
What is environmental chemistry?
What is the temperature range of the atmosphere?
In what regions of the atmosphere, the temperature increases with altitude and in which regions it decreases?
What is the size range of particulates?
How particulates help in the cloud formation?
Name three gases which are major air pollutants.
What are primary and secondary pollutants of the air?
Which zone is called ionosphere?
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