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प्रश्न
Differentiate between primary pollutants and secondary pollutants.
उत्तर
| Primary pollutants | Secondary pollutants | ||
| 1 | They are emitted directly from the source. | 1 | They are not emitted directly from the source but are formed due to chemical reactions. |
| 2 | They are found in the atmosphere in the form in which they are emitted. | 2 | They are formed in the atmosphere by chemical reactions between primary pollutants and atmospheric constituents. |
| 3 | Ash, smoke, dust, radioactive compounds, oxides of sulphur, carbon and nitrogen are primary pollutants. | 3 | SO3, O3, hydrogen cyanide, peroxyacetyl nitrate, ketones etc. are secondary pollutants. |
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संबंधित प्रश्न
Given below is a representation of a type pollution.
Study the picture and answer the questions :
1) Name the type of pollution shown in the picture
2) Name one source of this pollution
3) How does this pollution affect human health?
4) Write one measure to reduce this pollution
5) State one gaseous compound that leads to the depletion of the ozone layer and creates ‘Ozone holes’.
Identify the ODD term in each set and name the CATEGORY to which the remaining three belong :
Example : glucose, starch, cellulose, calcium
Odd term : calcium
Category : others are different types of carbohydrates
Polythene bag, Crop residue, Animal waste, Decaying vegetable.
Following is a statement about pollution. Which type of pollution does it express?
Problem of sneezing occurs sometimes during visit to garden.
Following is a statement about pollution. Which type of pollution does it express?
Crop does not grow up in some areas.
Following is a statement about pollution. Which type of pollution does it express?
People living in the busy squares face problems like short breathing and other respiratory problems.
Read the passage and identify the sentences expressing types of pollution.
Nilesh is a student of Std. VII and lives in urban area. It takes about an hour to go to the school by bus. He faces the heavy traffic of two wheelers, four wheelers, rickshaws, buses while going to school. He is facing the problem of asthma since last few days, Doctors recommended him to stay away from urban area. Since then, his mother sent him to the village of his maternal uncle, Nilesh saw the heaps of garbage at many places in village. Foul smell of human and animal wastes was present at many places. Blackish water with foul smell was flowing in a stream. He developed some abdominal disease within few days.
What are Pollutants?
What is the effect of oil spills on marine life?
What causes waterborne diseases? Name two waterborn diseases.
Name three gases emitted during burning of garbage.
Define water pollution
Distinguish between the following :
Natural Pollution and Anthropogenic Pollution
Give two causes of air pollution.
See the diagram and answer the following question
What types of pollution are caused by open dumps?
Identify who am I?
I am the type of pollution caused by burning of fossil fuels like petrol or coal and the smoke of burning garbage. I float around and cause breathing problems. I am _______ pollution.
land or soil pollution happens when toxic ______ change the natural balance in soil.
Complete the crossword puzzle with the help of clues given below :
Across
1. Pollutant which was used in refrigerators and air conditioners. (18)
3. Produced on incomplete combustion of fuels (14)
6. This chemical protects our crops and is washed into water bodies from the field. (9)
Down
2. This layer protects us from harmful ultraviolet rays. (5)
4. It is essential for combustion. (6)
5. Disease which is caused by drinking contaminated water. (7)
7. River which is famous in India and sustains most of the northern, central and eastern Indian population. (5)
Name the following:
The undesirable change in the environment leading to its deterioration.
An undesirable change in the environment is called as ______.
