Question

Hydrogen being and highly inflammable gas and being supporter of combustion ,yet water whic is made up of hydrogen and oxygen is used to extinguish fire,Why?

Answer 1

That's all different, when a atom mixed with each other at a high temp its all the characters may be charged ,like salt (u may know ) to mix a atom with another it needs high amount of heat and energy. Once its form is changed its characters are also changed.

Answer 2

$<b>$Water does contain Hydrogen and Oxygen, but it is a compound of two formed by a chemical reaction. Being a chemical compound, water doesn't have property of either Hydrogen or Oxygen. This is because when two or more element combine chemically, the reaction elements. Lose their respective properties and resultant product usually has properties totally different from those of the reacting elements. That is why the properties of water are quite different from those of hydrogen and oxygen.

Water is neither combustible nor support combustion. But it can absorb large amount of heat and can cool hot things effectively.

In order to burn, a substance must reach it's ignition temperature. When water is poured over burning fire ( except an electrical or oil fire), it cools the burning object below it's ignition temperature and puts out the fire.