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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.
Write ‘True’ or ‘False’ in front of following statement.
The trapping of solar heat energy in the earth’s atmosphere is called greenhouse effect.
With the help of a labeled diagram, describe a simple experiment to show the presence of oxygen and nitrogen in air using a piece of white phosphorus.
Air is a mixture of many _______.
Nitrogen is used in the food packaging industry because it _____.
How will you prove that air supports burning?
______ gas cylinders are used for breathing purpose for a diver going deep into the sea.
A gas that neither burns nor supports burning is ______.
The components of air which are harmful to living beings are ______.
Observe the picture given in figure carefully and answer the following questions.
- What is covering the nose and mouth of the police man?
- Why is he putting a cover on his nose?
- Can you comment on air quality of the place shown in the figure?
