Question

why only barium hydroxide gives purest hydrogen and why it give the hydrogen pure not impure? reason chahiye faaltu ka gyaan na pel dena ​

Answer 1

Explanation:

In lab, hydrogen is generally prepared by the reaction of zinc with dilute hydrochloric acid.

Pure hydrogen gas can be prepared by the electrolysis of warm solution of barium hydroxide using platinum or nickel electrodes. As water does not conduct electricity very well, so it is usual to electrolyse aqueous solution of barium hydroxide.