Q. 5 B5.0( 1 Vote )

Explain che

Answer :

chemical properties of dihydrogen gas are:

Reaction with dioxygen gas:


When dihydrogen gas reacts with dioxygen gas, it forms water


2H2 + O2 2H2O


i. Dihydrogen gas forms an explosive mixture with dioxygen gas.


ii. A large amount of heat is produced by this reaction.


Reaction with Metal oxide:


i. Dihydrogen gas is a good reducing agent.


ii. It reduces easily the metallic oxides.


For example: CuO + H2 Cu + H2O


Reaction with active metals:


Dihydrogen gas combines with active metals like Na, K, Ca and forms the metallic hydride of that metal.


H2 + 2Na 2NaH


H2 + 2K 2KH


H2 + Ca CaH2


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