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रासायनिक ऑक्सीजन माँग Chemical Oxygen Demand Quick & Easy to understand video lecture in Hindi

Chemical Oxygen Demand : जल में कार्बनिक व अकार्बनिका यौगिकों के ऑक्सीकरण के लिये आवश्यक ऑक्सीजन की मात्रा। अनुप्रयोगों - रासायनिक ऑक्सीजन माँग : प्रदूषण के ...

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Created by Chandra Kishore Feb 5, 2010 at 3:22pm. Last updated by Chandra Kishore on Tuesday.

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Created by Chandra Kishore Oct 5, 2009 at 3:19pm. Last updated by Chandra Kishore Apr 29, 2011.

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