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प्रश्न
Mountaineers carry oxygen cylinders with them because
पर्याय
there is no oxygen on high mountains.
there is deficiency of oxygen on mountains at high altitude.
oxygen is used for cooking.
oxygen keeps them warm at low temperature.
उत्तर
there is deficiency of oxygen on mountains at high altitude.
Explanation:
With increase in altitude, the atmosphere gets thinner and levels of oxygen decreases. This makes it difficult to breathe in higher altitudes as oxygen supply is reduced.
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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.
Tick (√) the most appropriate answer.
The humans pollute the air by :
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Sulphur dioxide gas dissolves in water to form ___________ acid.
Explain the importance of nitrogen of the air for plant growth.
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 |
Explain why during an incident of fire, one is advised to wrap a woollen blanket over a burning object.
The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.
Why do traffic assistants wear a mask on duty?
When cooled to -57°C, gaseous carbon-di-oxide becomes a liquid.
The components of air which are harmful to living beings are
