Advertisements
Advertisements
Question
Fill in the blank :
Oxygen occupies about _____% of air by volume.
Advertisements
Solution
Oxygen occupies about 21% of air by volume.
APPEARS IN
RELATED QUESTIONS
Two substances which undergo rapid oxidation.
Why is oxygen collected by downward displacement of water?
What happens when mercuric oxide is heated?
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?
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
Statement given below is incorrect. Write the correct statement :
Oxygen is prepared in laboratory by treating hydrogen oxide with manganese dioxide.
Statement given below is incorrect. Write the correct statement :
Calcium burns in oxygen with a golden-yellow flame.
Give reasons for the following:
oxygens finds utility in welding & cutting of metals.
Mention the physical properties of oxygen.
