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प्रश्न
What do you observe when a beam of light is allowed to enter in a closed dark room through a small hole.
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उत्तर
We will observe randomly moving dust particles in the beam of light. This confirms the presence of dust particles in the air.
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संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Discuss harmful effects of greenhouse effect.
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Give two uses of the following component present in air:
nitrogen
Give a brief account of the discovery of air and the scientists involved.
Describe a simple experiment with the help of a diagram to show that Air is highly compressible
What will happen if the number of vehicles and factories in your surroundings increases?
What is the importance of air in transmission of sound?
Take a squeezable bottle. Make a hole on the lid and close the bottle tightly. Bring the bottle near your face and press the bottle. What do you feel?
Which of the following statements is incorrect?
