Advertisements
Advertisements
प्रश्न
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
पर्याय
I and II
I and III
II and IV
I and IV
Advertisements
उत्तर
I and IV are the two gases, which when taken together, make up about 99 percentage of air.
APPEARS IN
संबंधित प्रश्न
Answer the question put against the following constituents of air :
Water vapours : Explain their role in modifying the earth’s climate.
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
Define the following:
Combustion.
State the utility of oxygen for respiration in plants
Name the following:
The active component of air which supports combustion and is used up in burning
Compare respiration and combustion-both involving oxygen of the air.
List uses of oxygen.
Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
What is the composition of air?
What is not true about air?
