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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
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.
How will you identify oxygen in the laboratory ?
Tick (√ ) the most appropriate answer.
The catalyst used in the preparation of oxygen from hydrogen peroxide is :
(a) Starting from hydrogen peroxide how is oxygen gas prepared in laboratory?
(b) What is the function of manganese dioxide?
(c) Write fully balanced equation for the liberation of oxygen from hydrogen peroxide.
(d) Why is the above method preferred to any other method?
Give tests for oxygen gas.
Phosphorous bums with suffocating smell and gives ______.
Write about the combustible property of Oxygen.
Write the reaction of oxygen with non–metals.
Write a note on the rusting process.
