Question

laboratory preparation of hydrogen monoxidelaboratory preparation of hydrogen mono oxide ​

Answer 1

Explanation:

the laboratory, dihydrogen is prepared by the treatment of zinc granules with dil.H2SO4. Dihydrogen of high degree of purity is prepared by the electrolysis of water in the presence of small amount of acid or base.

Answer 2

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In laboratory it is prepared by the reaction of granulated zinc with dil.Hcl. Commercial preparation of Hydrogen: Hydrogen is prepared by the electrolysis water using Platinum electrode.  When electric current is passed through water it decomposes to hydrogen and oxygen.

Laboratory preparation of Dihydrogen:  

1)  In laboratory it is prepared by the reaction of granulated zinc with dil.Hcl.

Zn + 2HCl → ZnCl2 +H2 ↑

2) Other laboratory method is by the action of metals like Zn, Al on strong alkalis like NaOH or KOH

Ex: Zn + 2NaOH → Na2ZnO2 + H2↑

Commercial preparation of Hydrogen:  Hydrogen is prepared by the electrolysis water using Platinum electrode. Here sulphuric acid is used to acidify water.

When electric current is passed through water it decomposes to hydrogen and oxygen. Hydrogen gas is released at cathode and oxygen gas is released at anode.

       2H2O  

Electricity

−−−−−−−−→   2H2 + O2

Mechanism:

H2O ↔ H++OH-

At anode: OH- - e- →OH

OH+ OH→ H2O + O

O + O → O2 ↑

At cathode: H+ + e- → H

H + H → H2 ↑

Industrially Hydrogen is prepared by  passing steam over red hot coke or hydrocarbons at high temperature in the presence of Nickel catalyst. The products are CO and Hydrogen.

 CH4 + H2O  

Ni

−→  CO + 3 H2

Water gas:  The mixture of  carbon monoxide and Hydrogen is called water gas(CO + H2)  

Water gas is used in the preparation of Methanol and other hydrocarbons

Water gas is also called syngas or synthesis gas.

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