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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.
What happens when oxygen gas is passed through alkaline pyrogallol solution ?
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____________ discovered the oxygen gas.
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Oxygen occupies about _____% of air by volume.
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Oxygen is ___________ to litmus testing.
What happens when Sulphur burns in oxygen ? Also give the balanced chemical equation for the reaction.
Write ‘True’ or ‘False’ in front of following statement.
Under laboratory conditions, the oxygen gas is insoluble in water.
Tick (√ ) the most appropriate answer.
The catalyst used in the preparation of oxygen from hydrogen peroxide is :
Tick (√ ) the most appropriate answer.
Sodium burns in oxygen with a flame which is :
Give reason for the following:
Oxidation of sulphur results in a product which turns moist blue litmus red.
