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

Options

A. Mixing natureal hydrocarbons of high molecular weight
B. Electrolysis of water
C. Reaction of salt like hydrides with water
D. Reaction of methane with steam

Answer

b

Explanation

Hydrogen of high purity is obtained by electrolysing aquepis barium hydroxide in presence of `Ni` electrodes.
`2e+2H_(2)O^(+)rarr2 H_(2)O+(1)/(2)H_(2)`
`2OH^(-)rarrH_(2)O+(1)/(2)O_(2)+2e`