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प्रश्न
What are the three major kinds of impurities in domestic wastewater?
उत्तर
- Spended solids, e.g., Sand, silt and clay.
- Colloidal materials, e.g., Fecal matter, bacteria, cloth and paper fibres.
- Dissolved materials, e.g., Nutrients (nitrate, ammonia, phosphate, sodium, calcium).
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संबंधित प्रश्न
Public all over India is very much concerned about the deteriorating air quality in large parts of North India. Alarmed by this situation the Resident's Welfare Association of your locality organized an awareness programme entitled "Bury not burn". They invited you, being a biology student to participate.
(a) How would you justify your arguments that promote burying and discourage burning? (Give two reasons)
(b) With the help of flow charts, one for each practice depict the chain of events that follow.
Algal bloom results in ______.
A high Biological oxygen demand (BOD) indicates that ______.
Which of the following exhibits biomagnification?
Algal blooms impart a distinct colour to water due to ______.
What is cultural eutrophication?
Name an industry which can cause both air and thermal pollution and as well as eutrophication.
What is an algal bloom?
What do you understand by biomagnification?
Is it true that if the dissolved oxygen level drops to zero, the water will become septic. Give an example which could lower the dissolved oxygen content of an aquatic body.
