Which of the following method is used to obtain high purity (> 99.95)% dihydrogen?
a
Electrolysing (aq) barium hydroxide solution between nickel electrodes
b
Electrolysing (aq)NaOH solution between nickel electrodes
c
Electrolysing (aq) barium hydroxide solution between platinum electrodes
d
Electrolysing (aq) NaOH solution between platinum electrodes
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