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प्रश्न
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
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उत्तर
Sodium reacts violently with acid.
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संबंधित प्रश्न
Fill in the blank
Hydrogen reacts with metal oxides to form ............and....................
Give reason for the following:
Though hydrogen is lighter than air it cannot be collected by downward displacement of air.
For laboratory preparation of hydrogen, give the following:
materials used
For laboratory preparation of hydrogen, give the following:
chemical equation
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Starting from hydrogen gas how would you obtain a metal by reduction of its heated oxide.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Magnesium - Mg + 2HCl → ______+ _______ [g]
State the reactant added to hydrogen to obtain the respective product in following case.
Water
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Fe3O4 + H2}\]
Give a balanced equation for the following conversion.
\[\ce{ZnO<-H2O->Fe3O4}\]
