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प्रश्न
Name and briefly explain four ways by which pollution of air is caused by humans.
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उत्तर
Pollution of air is caused by humans in the following ways :
- Large amount of coal burnt in thermal plants throw out huge amounts of smoke and ash in the atmosphere.
- Vehicles using petrol or diesel give out a lot of smoke and harmful gases like carbon-dioxide, lead, carbon- monoxide.
- Burning of garbage causes a lot of pollution due to the formation of carbon-monoxide, sulphur dioxide and nitrogen dioxide.
- Pesticides spread in the fields also cause air pollution.
APPEARS IN
संबंधित प्रश्न
Tick (√) the most appropriate answer.
The humans pollute the air by :
Define the following:
Combustion.
Write ‘true’ or ‘false for the following;
The composition of air was discovered by Lavoisier.
State the utility of oxygen for respiration in living organisms
Match the statements in List 1 with the correct answers in List 2
| List 1 | List 2 | ||
| 1 | An impurity in air | A | Water vapour |
| 2 | The component of air which supports combustion | B | Respiration |
| 3 | The inert component in the air slightly soluble in water | C | Rare gases |
| 4 | The component of air which minimizes the rate of evaporation | D | Sulphur dioxide |
| 5 | The process which involves oxidation of food substance in living organisms | E | Helium |
| 6 | The component of air which finds application in observation balloons | F | Carbon dioxide |
| 7 | The process which involves oxidation of substances, liberating heat and light energy | G | Combustion |
| 8 | The component of air which is heavier than air and fairly soluble in water | H | Nitrogen |
| 9 | The process by which atmospheric carbon dioxide is absorbed by plants resulting in the formation of carbohydrates | I | Photosynthesis |
| 10 | The component of air which is lighter than air and less than 1% in air | J | Oxygen |
Complete the statement given below by filling in the blank with the correct word from the words given:
The component of air used in photosynthesis is ______ and the products of photosynthesis is oxygen.
Give word equation for the following conversion:
Nitric acid to soluble nitrates in the soil
Analogy
Photosynthesis : _____ :: Respiration : Oxygen
Composition of the component of air ______ from place to place.
Air also contains a small amount of carbon-di-oxide, water vapour, and some other gases like argon,
