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प्रश्न
How is oxygen naturally renewed in air ?
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उत्तर
All living beings use atmospheric oxygen in breathing and burning of fuels and in the formation of oxides of nitrogen. Yet amount of oxygen in the air remains more or less constant. This is because green plants return oxygen to the atmosphere by the process of photosynthesis.
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संबंधित प्रश्न
What happens when a glowing splinter is introduced in a jar containing oxygen ?
Why is potassium chlorate not used for laboratory preparation of oxygen ?
Fill in the blank :
____________ discovered the oxygen gas.
Fill in the blank:
Oxygen is slightly _________ than air.
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
State the precautions while preparing oxygen in the labo-ratory.
State two characteristics of Acidic oxides.
Statement given below is incorrect. Write the correct statement :
Oxygen is prepared in laboratory by treating hydrogen oxide with manganese dioxide.
Oxygen is a poor conductor of heat and electricity.
Write a note on the rusting process.
