Preparation of Hydrogen

Among statements (a)-(d), the correct ones are : (a) Decomposition of hydrogen peroxide gives dioxygen. (b) Like hydrogen peroxide, compounds, such as KClO_(3), Pb(NO_(3))_(2) and NaNO_(3) when heated liberate dioxygen. (c) 2-Ethylanthraquinone is useful for the industrial preparation of hydrogen peroxide. (d) Hydrogen peroxide is used for the manufacture of sodium perborate.

Water gas is mixed with steam and the mixture is passed over heated Fe_(2) O_(3) in presence of Cr_(2)O_(3) . The mixture when passed in water dissolves CO_(2) and dihydrogen left undissolved is collected . This method of preparation of hydrogen gas is know as

Introduction|Position Of Hydrogen In The Periodic Table|Preparation Of Dihydrogen|Summary

Hydrogen - Preparation, Properties And Hydrides

The most dangerous method of preparing hydrogen would be by the action of HCl on

what happens if conc H_(2)SO_(4) is used in preparing hydrogen by its reaction with a metal?

Can we use conc. H_(2)SO_(4) for preparing hydrogen gas from zinc metal?