Advertisements
Advertisements
Question
“Air is a mixture”. Support this statement citing at least three evidences.
Advertisements
Solution
“Air is a mixture” The following are in evidences which prove that air is a mixture.
- The composition of air varies from place to place and from time to time.
- The components of air retain their individual properties.
- Liquid air has no definite boiling point.
- No energy exchange occurs when the components of air are mixed with each other.
APPEARS IN
RELATED QUESTIONS
Describe a simple experiment to show that l/5th of air is oxygen.
State the utility of oxygen for respiration in plants
State a reason why there is a balance in the amount of carbon dioxide in the air, even though carbon dioxide is released into the atmopshere by various processes.
What is the source of carbon dioxide in air?
How will you prove that soil contains air in it?
Write the percentage of the gases present in air.
The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.
Match the following.
| Nitrogen | Respiration in living animals |
| Oxygen | Fertilizer |
| Carbon dioxide | Refrigerator |
| Dry ice | Fire extinguisher |
“Air is not an elementary substance, but a composition”. Why?
______ exists in nature as silicates, carbonates, oxides, and water. It also exists in a free state as part of the air in the atmosphere.
