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प्रश्न
Tick (√) the correct alternative from the choice given for the following statement.
Air consists of
विकल्प
only oxygen
only nitrogen
only carbon dioxide
all of these
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उत्तर
all of these
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संबंधित प्रश्न
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
How is greenhouse effect produced?
Give two uses of the following component present in air:
water vapour
How is air useful to windmills?
Tick (√) the correct alternative from the choice given for the following statement.
Respiration
Name the following.
Gases that are harmful to the ozone layer
While freezing, the ______ of water is lowered.
Draw a neat labelled diagram for the following experiment.
To determine the component of air used up in burning, by using phosphorus and a bell jar.
Make sentences using the given set of words.
Air, wind, motion, called
