Biochemical oxygen demand, amount of dissolved oxygen used by microorganisms in water. This video is about: Biochemical Oxygen Demand (BOD). Subscribe to our YouTube channel to watch more Chemistry lectures. Practice tests and free video lectures for Physics, Chemistry, Biology, Math’s, Computer Science, English & more subjects are also available at Sabaq.pk. So, subscribe to Sabaq.pk/Sabaq Foundation now and get high marks in your exams. About Us: Sabaq.pk or Sabaq Foundation is a non-profit trust providing free online video lectures for students from classes K - 14 for all education boards of Pakistan including FBISE, Sindh Board, KP Board, Baluchistan Board as well as for Cambridge. We have a team of qualified teachers working their best to create easy to understand videos for students providing 14,000 + free lectures for subjects including Physics, Chemistry, Mathematics, Biology, English, General Science, Computer Science, General Math, Statistics and Accounting. Sabaq.pk

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Dissolved oxygen as amount of oxygen dissolved (hence available to sustain life) in body of water. This video is about: Dissolved Oxygen(DO). Subscribe to our YouTube channel to watch more Chemistry lectures. Practice tests and free video lectures for Physics, Chemistry, Biology, Math’s, Computer Science, English & more subjects are also available at Sabaq.pk. So, subscribe to Sabaq.pk/Sabaq Foundation now and get high marks in your exams. About Us: Sabaq.pk or Sabaq Foundation is a non-profit trust providing free online video lectures for students from classes K - 14 for all education boards of Pakistan including FBISE, Sindh Board, KP Board, Baluchistan Board as well as for Cambridge. We have a team of qualified teachers working their best to create easy to understand videos for students providing 14,000 + free lectures for subjects including Physics, Chemistry, Mathematics, Biology, English, General Science, Computer Science, General Math, Statistics and Accounting. Sabaq.pk

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Concept of nutrient pollution and thermal pollution as two types of water pollution. This video is about: Nutrient and Thermal Water Pollution. Subscribe to our YouTube channel to watch more Chemistry lectures. Practice tests and free video lectures for Physics, Chemistry, Biology, Math’s, Computer Science, English & more subjects are also available at Sabaq.pk. So, subscribe to Sabaq.pk/Sabaq Foundation now and get high marks in your exams. About Us: Sabaq.pk or Sabaq Foundation is a non-profit trust providing free online video lectures for students from classes K - 14 for all education boards of Pakistan including FBISE, Sindh Board, KP Board, Baluchistan Board as well as for Cambridge. We have a team of qualified teachers working their best to create easy to understand videos for students providing 14,000 + free lectures for subjects including Physics, Chemistry, Mathematics, Biology, English, General Science, Computer Science, General Math, Statistics and Accounting. Sabaq.

Neal LakhaniAug 5, 2026

Class 12 Punjab Chemistry Textbook

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