Advertisements
Advertisements
Question
Fill in the blank :
Oxygen occupies about _____% of air by volume.
Solution
Oxygen occupies about 21% of air by volume.
APPEARS IN
RELATED QUESTIONS
Why is oxygen collected by downward displacement of water?
Why is hydrogen peroxide preferred in the preparation of oxygen gas ?
Give four uses of oxygen.
Fill in the blank:
Oxygen occupies about ______ of air by volume.
Why is potassium chlorate is not used for laboratory preparation of oxygen ?
What happens when Sulphur burns in oxygen ? Also give the balanced chemical equation for the reaction.
State the precautions while preparing oxygen in the labo-ratory.
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
Phosphorus pentaoxide on dissolving in water forms _________ acid.
Write the reaction of oxygen with non–metals.
