300 Level Chemistry Department exam questions and detailed answers. Download the answers in document format. Correct, detailed, and straightforward answers.
Questions:
(a) When is water said to be polluted?
(b) State two sources and two effects of each of the following water pollutants:
(i) Oxygen-demanding sewage
(ii) Heavy metals
(c) State two major importance of dissolved oxygen in seawater
(d) State two major pollutants that can lead to decreased levels of dissolved oxygen in seawater
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