Question
Which gas is primarily monitored to assess organic
pollution in sewage and surface water?Solution
Dissolved oxygen (Oâ‚‚) levels in water are critical for assessing organic pollution. The biochemical oxygen demand (BOD) test, which measures the amount of oxygen consumed by microorganisms in decomposing organic matter, is a key indicator of water quality and pollution levels.
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In which of the following years was the National Archives of India established?
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