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प्रश्न
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Fe3O4 + H2}\]
विकल्प
dilute acid
dilute alkali
cold water
conc. alkali
boiling water
conc. acid
steam
उत्तर
Reactant added to get the product:
\[\ce{Fe3O4 + H2:Steam}\]
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