COD (Chemical Oxygen Demand) is a measure of the amount of oxygen required to break down organic matter in water. It is an indicator of organic pollution, as high COD levels signify a large amount of organic waste. This makes COD a crucial parameter in assessing water quality.
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2303
What is a suitable substance for water disinfection?
KMnO4, or potassium permanganate, is a strong disinfectant commonly used for water treatment. It effectively kills bacteria and other microbes, making water safe for consumption. While other options like Ozone are also used for disinfection, KMnO4 is specifically correct in this context.
2304
What percentage of suspended solid waste in raw water is removed by coagulation?
Coagulation is a step in water treatment that removes suspended solid waste from raw water. The correct answer is 80, as this percentage of suspended solid waste is typically removed during the coagulation process.
2305
How can phosphate in sewage water that causes eutrophication be removed?
Phosphate in sewage water can be removed by adding Lime, which helps to precipitate out the phosphate as calcium phosphate, thereby reducing eutrophication. This process is a common method for controlling phosphate levels in wastewater treatment.
2306
Which of the following is given off during ripening fruits and vegetables?
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2307
Formalin consists of mixture of formaldehyde methyl alcohol and water Percentage of water in it is________________?
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2308
Which of the following is an intestinal disease caused by bacteria such as E.coli?
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2309
Water of crystallization can be removed by________________?
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2310
What is the physical state of bromine when reacted with an alkene?
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