Advertisements
Advertisements
प्रश्न
State the precautions while preparing oxygen in the labo-ratory.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
A chemical called oxygenated water.
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 is slightly _________ than air.
Fill in the blank:
Manganese dioxide acts as a _________.
Why is potassium chlorate is not used for laboratory preparation of oxygen ?
Complete and balance the following equation
\[\ce{N2 + O2 ->[3000°C]}\]
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.
Tick (√ ) the most appropriate answer.
The catalyst used in the preparation of oxygen from hydrogen peroxide is :
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 ______.
