Write the preparation of dihydrogen and explain its physical and chemical properties.
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It can be prepared by reaction of metals with water like
3Fe + 4H2O Fe3O4 + 4H2 or by reaction of acds or strong alkalis with metals or by hydrolysis 2H2O gives 2H2 +O2.
It is tasteless, colorless and odorless and is extremely less soluble in water.
It is not much reactive owing to its high dissociation energy.
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Tasteless , Colourless , Odourless
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