Question

brief on preparation of hydrogen all methods.

Answer 1

✔️✔️Preparation of hydrogen :-

⭕️LABORATORY METHOD:-
➖hydrogen can be prepared by reaction of dilute acids like Hcl and H2So4 with reactive metals

➖example -
⏹Zn+Hcl------>ZnCl2+H2

➖Hydrogen can be obtained by electrolysis if brine {⭕️Aq. NaCl sol.⭕️}

➖Hydrogen is prifycated at cathode since water undergoes reduction faster then Na+.

✔️️INDUSTRIAL METHOD:-
[⭕️COAL GASIFICATION METHOD⭕️]

➖Hydrogen is obtained industrially by passing steam over red hot coke .
C+H2O----127K----->CO+H2

➖Carbon monoxide H mix is called :-
⭕️water gas/sin gas⭕️
where it's used as industrial fuel.

➖The production of H2 is increased by passing excess steam through water gas which is known as :-
⭕️water gas shift recation⭕️
CO+H2O---573k----->CO2+H2