Why this happens?
Solution-
All elements, molecules and compounds have their own properties. That's why they are used for different purposes.
Flammability is the ability of a molecule to be ignited and keep a fire going on. Now O2 or any other oxidiser is a requirement for a substance to catch fire. Not only hydrogen, there are many combustible substances which show combustion in the presence of oxygen.
Similarly CO2 is used in fire extinguisher for eliminating fire. Similarly water is also used to put out fires.
So it it their chemical and physical properties and according to these properties only their roles have been invented.
All elements, molecules and compounds have their own properties. That's why they are used for different purposes.
Flammability is the ability of a molecule to be ignited and keep a fire going on. Now O2 or any other oxidiser is a requirement for a substance to catch fire. Not only hydrogen, there are many combustible substances which show combustion in the presence of oxygen.
Similarly CO2 is used in fire extinguisher for eliminating fire. Similarly water is also used to put out fires.
So it it their chemical and physical properties and according to these properties only their roles have been invented.