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प्रश्न
State the precautions while preparing oxygen in the labo-ratory.
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उत्तर
The various precautions are :
- Donot collect the first-few bubbles of the gas produced as it is the air in the delivery tube which is driven out
- Method of collection of gas should be appropriate Arundeep’s M.S. Chemistry-7th 126
- Keep all inflammable and bummg apparatus away as oxygen is j a supporter of conbustion.
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संबंधित प्रश्न
Two substances from which oxygen can be obtained at a large scale.
Taking hydrogen peroxide, how would you prepare oxygen in the laboratory ?
Why is oxygen collected by downward displacement of water?
What happens when mercuric oxide is heated?
Fill in the blanks:
Oxygen is collected by the __________ displacement of ________.
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: sulphurous, nitric acid, red lead oxide paint, oxygen, phosphoric
The nitric oxide gas reacts with the oxygen and water vapour to form ______ vapour.
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
Write the reaction of oxygen with non–metals.
Write a note on the rusting process.
