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प्रश्न
Name three noble gases present in the air. State their one industrial use
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उत्तर
Three noble gases present in the air are :
- Helium : It is used for filling weather observation balloons.
- Argon : It is used for filling electric bulbs at low pressure.
- Neon : It is used for making advertising glow tubes, used on big shops, hotels etc. at night.
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संबंधित प्रश्न
Answer the question put against the following constituents of air :
Oxygen : What is the percentage proportion of oxygen in air ? Why is oxygen called active air.
Name and briefly explain four ways by which pollution of air is caused by humans.
Statement given below is incorrect. Write the correct statement :
Potassium nitrate on strong heating decomposes into potassium nitrite and nitrogen gas.
Complete the statement given below by filling in the blank with the correct word from the words given
___________is an example of a pollutant present in the air.
What is the percentage of oxygen in air?
Air is a mixture of many _______.
How will you show that air is dissolved in water?
______ is necessary for all acids.
A ______ gas that is used to remove carbon impurities from the steel.
Assertion: Carbon dioxide occurs as carbonates in nature.
Reason: Carbon dioxide can exist as a liquid at atmospheric pressure.
