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प्रश्न
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 |
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उत्तर
| List 1 | List 2 | ||
| 1 | An impurity in air | D | Sulphur dioxide |
| 2 | The component of air which supports combustion | J | Oxygen |
| 3 | The inert component in the air slightly soluble in water | H | Nitrogen |
| 4 | The component of air which minimizes the rate of evaporation | A | Water vapour |
| 5 | The process which involves oxidation of food substance in living organisms | B | Respiration |
| 6 | The component of air which finds application in observation balloons | E | Helium |
| 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 | F | Carbon dioxide |
| 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 | C | Rare gases |
संबंधित प्रश्न
State three uses of water vapour in the air.
Name and briefly explain four ways by which pollution of air is caused by humans.
Give reason:
Mountaineers and divers carry oxygen cylinders with them.
Complete the statement given below by filling in the blank with the correct word from the words given
___________is an example of a pollutant present in the air.
Complete the statement given below by filling in the blank with the correct word from the words given:
The product formed which is common to both combustion and respiration is ______.
State four different properties of a compound and a mixture.
Mention one necessary condition for the combustion to take place.
Aerated water contains
Usha took a lump of dry soil in a glass and added water to it till it was completely immersed. She observed bubbles coming out. The bubbles contain ______.
Explain the following observations very briefly
Breathing through mouth may harm you.
