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प्रश्न
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
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उत्तर
Calcium carbonate – CaCO3
These droplets were present in the air as moisture which got condensed on the cooler walls of a glass tumbler. This shows the presence of water vapours in air.
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संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
How is greenhouse effect produced?
State two similarities and two differences between respiration and burning.
How is air useful to windmills?
Describe a simple experiment with the help of a diagram to show that Air has mass
______ soil has pH 7.
Fill in the blank:
A candle burns in a jar of oxygen, but gets extinguished in ______
______ is important for all living creatures.
Match the following:
| 1. | Layer of air | a. | Hand fan |
| 2. | Electrical energy | b. | 21% |
| 3. | Nitrogen | c. | Windmill |
| 4. | Oxygen | d. | Atmosphere |
| 5. | Palm Trees | e. | 78% |
State whether the following statement is true or false. If false, correct them.
Air does not occupy any space.
