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प्रश्न
Tick (√ ) the most appropriate answer.
The catalyst used in the preparation of oxygen from hydrogen peroxide is :
पर्याय
Magnesium oxide
Manganese oxide
Manganese dioxide
Manganese hydroxide
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उत्तर
Manganese dioxide
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संबंधित प्रश्न
An oxide and a carbonate containing oxygen.
Why is potassium chlorate not used for laboratory preparation of oxygen ?
How is oxygen naturally renewed in air ?
Fill in the blank space by choosing the correct word from the given list.
List: oxygen, carbonic, suIphur dioxide gas, precipitation, helium
Every nine parts of water by weight contains eight parts by weight of _________.
Fill in the blank:
Oxygen occupies about ______ of air by volume.
How will you identify oxygen in the laboratory ?
Complete and balance the following equation
Al + O2 →
Write ‘True’ or ‘False’ in front of following statement.
Under laboratory conditions, the oxygen gas is insoluble in water.
Write ‘True’ or ‘False’ in front of following statement.
Liquid oxygen is used for burning fuel in spaceships.
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
