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प्रश्न
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
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
Fill in the blanks :
_______ and ______ are the most common air pollutants.
Give reason:
When water is heated, we see bubbles rising up.
Of the total volume of air – 4/5th is nitrogen. State the utility or consequence of this ratio.
Mention one necessary condition for the combustion to take place.
_______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.
- Nitrogen
- carbon-di-oxide
- Noble gases
- Oxygen
Soda bottle bursts sometimes when it is opened during summer. Why?
Which gas in the atmosphere is essential for respiration?
Air also contains a small amount of carbon-di-oxide, water vapour, and some other gases like argon,
Tri oxygen molecule is known as ______.
What is not true about air?
