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प्रश्न
Starting from zinc how would you obtain hydrogen using Steam.
[Give balanced equation & name the product formed in the case other than hydrogen].
Name a metal which will not react with the reactants above to give hydrogen.
उत्तर
To obtain hydrogen using:
Steam: Metals above [H] in activity series of metals, i.e. Zn, Fe and Pb react with steam and form corresponding oxides.
\[\ce{3Fe +\underset{\text{Steam}}{4H2O}⇌\underset{\text{[Magnetic oxide of iron] or [Trionr tetroxide]}}{Fe3O4 + 4H2}}\]
\[\ce{Zn + H2O -> \underset{Zinc oxide}{ZnO} + H2}\]
Metals below [H] do not react even with steam. Metal are Cu, Hg, Ag, Pt and Au.
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
Nitric acid cannot be used to prepare hydrogen by its action on active metals.
Name the following:
A metal which liberates hydrogen only when steam is passed over red hot metal.
Name the chemicals required to prepare hydrogen gas in the laboratory.
FILL IN THE BLANK
Sodium liberates hydrogen when treated with cold .............
Give a test to identify hydrogen ?
Under what conditions can hydrogen be made to combine with chlorine?
Name the products and write the equation for the reaction.
How would you show that hydrogen is lighter than air?
Draw neat labelled diagrams for two different experiments to prove that – hydrogen is lighter than air.
Give a reason for the following.
Nitric acid in the dilute form is not used in the laboratory preparation of hydrogen from metals.
Select the correct answer from the symbol in the bracket.
The element which forms a diatomic molecule.
