Engineering
Chemistry
Hydrogen Preparation and Properties
Hydrides Preparation and Types
Question

Very pure hydrogen (99.9%) can be made by which of the following processes?

Reaction of methane with steam

Electrolysis of water

Mixing natural hydrocarbons of high molecular weight

Reaction of salt like hydrides with water

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Solution

H2O H+ + OH

            2H+ +2e H2(g)­

                                  (At cathode)

            2OH  H2O + H+