JEE Main 2022 · 25 Jul · Shift 2 · Chemistry Q68

ChemistrySingle correct+4 / -1Question 68 of 90

High purity (>99.95%) dihydrogen is obtained by

reaction of zinc with aqueous alkali.

electrolysis of acidified water using platinum electrodes.

electrolysis of warm aqueous barium hydroxide solution between nickel electrodes.

reaction of zinc with dilute acid.

Answer and worked solution

Official answer: C

Very pure $\mathrm{H_2}$ comes from electrolysing warm barium hydroxide solution with nickel electrodes.

(C)

Topics:Preparation and properties of hydrogen

JEE Main 2022 · 25 Jul · Shift 2, Chemistry question 68