Advertisements
Advertisements
प्रश्न
Fill in the blank :
Oxygen occupies about _____% of air by volume.
उत्तर
Oxygen occupies about 21% of air by volume.
APPEARS IN
संबंधित प्रश्न
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?
What happens when Sulphur burns in oxygen ? Also give the balanced chemical equation for the reaction.
How will you identify oxygen in the laboratory ?
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.
Statement given below is incorrect. Write the correct statement :
Calcium burns in oxygen with a golden-yellow flame.
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 :
State three uses of oxygen, other than artificial respiration.
Give reason for the following:
Oxygen gas does not affect moist blue litmus paper, but carbon dioxide turns it slightly pink.
