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प्रश्न
Which of the following components of air is present in the largest amount in the atmosphere?
विकल्प
Nitrogen
Oxygen
Water vapour
Carbon dioxide
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उत्तर
Nitrogen
Explanation:
Atmospheric air contains all four mentioned components but the component with the largest amount present in the air is nitrogen, which constitutes 78% of the atmospheric air whereas oxygen constitutes 21% and the remaining 1% is formed by water vapour, carbon dioxide, few other gases and dust particles.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Classify Carbon monoxide. Also give a balanced equation to prepare it.
Give reason:
When water is heated, we see bubbles rising up.
Name the components of air with their approximate percentage by volume in air. Does the percentage by volume of each component remain the same, in the atmosphere of different parts of the world? Explain with reasons.
State what would happen, if the air above the earth contained mainly oxygen and no nitrogen
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 |
The diagrams below represents an experiment to show the presence of a component of air.
- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The mesosphere in the atmosphere, contains most of the air, fit for respiration
List out the uses of carbon dioxide.
Venus's atmosphere consists of roughly 96 – 97% of ______.
