JEE Main 2022 Chemistry question
High purity (>99.95%) dihydrogen is obtained by (A) Reaction of zinc with aqueous alkali (B) Electrolysis of acidified water using platinum electrodes (C) Electrolysis of warm aqueous barium hydroxide solution between nickel electrodes (D) Reaction of zinc with dilute acid
Answer: (C)
Solution
High purity (> 99.95%) dihydrogen is obtained by electrolysing warm aqueous barium hydroxide solution between nickel electrodes.