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प्रश्न
Differentiate between chemical pollution and thermal pollution.
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उत्तर
(a)
Chemical pollution:
A large number of industrial chemicals which include chemicals from paint, textile & dyestuff industry & various acids & salt solutions enter into the water when discharged as industrial wastes.
Chemical pollutants include — Metallic salt solutions of mercury & lead which cause heavy devastation of marine & plant life.
Agricultural wastes include — Poisonous pesticides namely fungicides & insecticides which may also enter underground water through the soil.
(b)
Thermal pollution:
Certain industries such as the iron & steel industry & numerous chemical plants use large amounts of water for varied functions.
The discharged wastewater after going through technical processes is rendered hot & on entering streams of natural water enhances the growth of harmful biological organisms.
संबंधित प्रश्न
Define pollution. “Industries are pouring poison in water” - Explain
Study the picture given below and answer the following questions :
What is a ‘Pollutant’ ? Explain the term.
List two major harmful effects of the following:
Rivers contaminated with sewage.
Answer the following question:
Name two human diseases caused due to water pollution.
State whether the following statement is true or false. If false, write the correct statement.
Chemical pollutants include a metallic salt solution of mercury and lead.
What is water pollution?
Name two heavy metals from industries that pollute water.
With reference to the sources of water pollutants answer the following question:
Why is it harmful to dispose of household detergents in water bodies?
What could be the harmful effects of improper management of industrial and domestic solid waste in a city?
BOD is measure of ______.
