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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
Answer the question put against the following constituents of air :
Carbon dioxide : “Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air.” Support this statement with relevant facts.
Tick (√) the most appropriate answer.
Which is not a polluting gas for the air?
Briefly state the importance of Oxygen.
Write fully balanced equation for the following :
Ca(OH)2 + CO2 →
Write down the composition of three main gases present in air by volume.
Fill in the blank
The reddish-brown powder on the surface of iron nails exposed to air and moisture is called _____.
Complete the statement given below by filling in the blank with the correct word from the words given:
The component of air used in photosynthesis is ______ and the products of photosynthesis is oxygen.
Name the following:
The component of air which does not support combustion.
______ gas is essential for the proper growth of all plants.
Oxygen is used to oxidize ______.
