Advertisements
Advertisements
प्रश्न
The most abundant element in the earth’s crust.
Advertisements
उत्तर
Oxygen.
APPEARS IN
संबंधित प्रश्न
What is the role of manganese dioxide in the preparation of oxygen?
What happens when mercuric oxide is heated?
Name the three types of oxidation processes. In which of these large amount of heat and light energy are produced?
Statement given below is incorrect. Write the correct statement :
The percentage of oxygen in air by volume, varies from 21% to 22%.
Fill in the blank:
Oxygen occupies about ______ of air by volume.
State the use of manganese dioxide in the laboratory prepa-ration of oxygen from potassium chlorate.
How will you obtain dry oxygen in the laboratory?
Complete and balance the following equation
\[\ce{N2 + O2 ->[3000°C]}\]
State three uses of oxygen, other than artificial respiration.
Phosphorous bums with suffocating smell and gives ______.
