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प्रश्न
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
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उत्तर
- Neon – In neon sign advertisements A brilliant red glow is seen on the passage of an electric current through neon gas at low pressure. The colour can be changed by mixing mercury vapour and argon with neon.
- Xenon – In fluorescent bulbs flash bulbs and lasers. It emits intense white light in discharge tubes.
संबंधित प्रश्न
“Air is a mixture”. Support this statement citing at least three evidences.
Answer the question put against the following constituents of air :
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Name and briefly explain four ways by which pollution of air caused by humans is minimised.
Name three noble gases present in the air. State their one industrial use
Give reason:
Aquatic animals and plants are able to survive in the matter.
With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.
State the utility of oxygen for respiration in plants
Why do we see the sky and air clear and clean after rainfall?
What was the old name of nitrogen?
______ exists in nature as silicates, carbonates, oxides, and water. It also exists in a free state as part of the air in the atmosphere.
