Advertisements
Advertisements
प्रश्न
Make sentences using the given set of words.
99%, oxygen, nitrogen, air, together
Advertisements
उत्तर
Nitrogen and oxygen together make up 99% of the air.
APPEARS IN
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.
Statement given below is incorrect. Write the correct statement :
Symbiotic bacteria are present in nodules of cereal plants such as wheat.
Briefly state the importance of Water vapour.
Name and briefly explain four ways by which pollution of air is caused by humans.
What is the significance of water vapour in air?
Fill in the blank
The reddish-brown powder on the surface of iron nails exposed to air and moisture is called _____.
Give a reason why nitrogen is filled in food packets and not oxygen.
Name the following:
The component of air which is present more in industrial areas.
What is the source of carbon dioxide in air?
When cooled to -57°C, gaseous carbon-di-oxide becomes a liquid.
