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प्रश्न
Name the following:
An inert gas which has a low boiling point and is used for producing very low temperatures
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उत्तर
Helium
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.
Define the term smog.
Describe a simple experiment to show that l/5th of air is oxygen.
Fill in the blank space by choosing the correct word from the given list.
List: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
Sulphur dioxide gas dissolves in water to form ___________ acid.
What are fuels?
Give a reason why two different rare (inert) gases find application in advertisement signs and fluorescent bulbs.
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.
How do astronauts breathe when they go beyond the earth’s atmosphere?
Nitrogen is an essential element present in proteins and nucleic acids which are the building blocks of living things.
Write the reaction of carbon dioxide with lime water.
