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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
Fill in the blank :
________ is the most abundant inert gas present in air.
Tick (√) the most appropriate answer.
The presence of water vapour in air is essential for :
Write ‘true’ or ‘false for the following;
The composition of air was discovered by Lavoisier.
Name three different appliances where air is utilized.
Complete the statement given below by filling in the blank with the correct word from the words given below
The ______ is a layer which extends up to about 10-50 km. above the earth.
How will you prove that soil contains air in it?
List uses of oxygen.
Arrange the following statements in correct sequence
- Plants manufacture food by a process called photosynthesis.
- Plants require energy for their growth.
- Plants take in oxygen and release carbon dioxide just as animals.
- Plants take carbon dioxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
- Such oxygen is available to animals and human beings for breathing.
- During this process, oxygen is released by plants.
Why do traffic assistants wear a mask on duty?
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Nitrogen
