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प्रश्न
The natural way of adding oxygen to air which involves green plants is called
पर्याय
photosynthesis
respiration
burning
dissolution
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उत्तर
photosynthesis
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संबंधित प्रश्न
Two substances from which oxygen can be obtained at a large scale.
Why is hydrogen peroxide preferred in the preparation of oxygen gas ?
Statement given below is incorrect. Write the correct statement :
The percentage of oxygen in air by volume, varies from 21% to 22%.
Fill in the blanks:
Oxygen is collected by the __________ displacement of ________.
Why is potassium chlorate is not used for laboratory preparation of oxygen ?
State the precautions while preparing oxygen in the labo-ratory.
State three uses of oxygen, other than artificial respiration.
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
Phosphorous bums with suffocating smell and gives ______.
