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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
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उत्तर
I and IV are the two gases, which when taken together, make up about 99 percentage of air.
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संबंधित प्रश्न
State three uses of water vapour in the air.
Briefly state the importance of Nitrogen.
Give reason:
When water is heated, we see bubbles rising up.
Name the following:
The component of air which does not support combustion.
Compare respiration and combustion-both involving oxygen of the air.
What is the source of oxygen gas in air?
Explain why mountaineers carry oxygen cylinders with them?
Nitrogen is _______ than air.
During respiration, carbon-di-oxide is exhaled out of the body through the ______.
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
