Question

Very pure hydrogen is obtained by

• A. Reaction of coal or CO with steam
• B. Electrolysis of warm, aqueous solution of $Ba(OH{)}_2$ between nickel electrodes
• C. Cracking of naphtha and fuel cell
• D. Adding zinc granules to all acids

Answer 1

The correct option is B

Electrolysis of warm, aqueous solution of $Ba(OH{)}_2$ between nickel electrodes

Electrolysis of water is the method by which the most pure form of hydrogen can be obtained since the hydrogen gas is collected in an isolated volume.