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Explain about the different industrial preparation of hydrogen. |
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Answer» Solution :In the large SCALE, hydrogen is produced currently by steam reforming of hydrocarbons. Steam and METHANE reacts with each other in the PRESENCE of nickel catalyst at 35 atm and at a temperature of `800^(@)C` gives hydrogen. `CH_(4(g))+H_(2)O_((g))toCO_((g))+3H_(2(g))` Steam is passed over a red hot coke to produce carbon monoxide and hydrogen. `C_((s))+H_(2)O_((g))tounderset(water)underbrace(CO_((g))+H_(2(g))` Water gas Water is reduced to hydrogen with carbon monoxide by passing over iron oxide catalyst at `400^(@)C` .`CO_((g))+H_(2)O_((g))toCO_(2(g))+H_(2(8))` Hydrogen is produced as a by-product in oil refining industry during the cracking of long chain hydrocarbons. `C_(6)H_(12(g))toC_(6)H_(6(g))+3H_(2(g))` Hydrogen is also obtained in the manufacture of chlorine and sodium hydroxide via ELECTROLYSIS of a concentrated solution of sodium chloride. |
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