Very pure hydrogen (99.9%) can be made by which of the following processes ?
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a
Mixing natural hydrocarbons of high molecular weight
b
Electrolysis of water
c
Reaction of salt like hydrides with water
d
Reaction of methane with steam
answer is B.
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Detailed Solution
Hydrogen of high purity is obtained by electrolyzing aqueous barium hydroxide in presence of Ni electrodes.2H2O+2e- → 2OH- + H2 2OH- → H2O + 12 O2 + 2e-