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प्रश्न
Statement given below is incorrect. Write the correct statement :
Oxygen is prepared in laboratory by treating hydrogen oxide with manganese dioxide.
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उत्तर
Oxygen is prepared in laboratory by treating hydrogen peroxide with manganese dioxide.
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संबंधित प्रश्न
Why is oxygen collected by downward displacement of water?
Why is potassium chlorate not used for laboratory preparation of oxygen ?
Name the three types of oxidation processes. In which of these large amount of heat and light energy are produced?
Fill in the blank :
Oxygen occupies about _____% of air by volume.
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 _________.
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
How will you obtain dry oxygen in the laboratory?
Statement given below is incorrect. Write the correct statement :
Calcium burns in oxygen with a golden-yellow flame.
Tick (√ ) the most appropriate answer.
When sulphur burns in oxygen, the colour of the flame is :
State three uses of oxygen, other than artificial respiration.
