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प्रश्न
For laboratory preparation of hydrogen, give the following:
method of collection
उत्तर
It is collected by the downward displacement of water.
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संबंधित प्रश्न
Name the following:
Two metals which give hydrogen with cold water.
Why hot concentrated sulphuric acid is not used in the preparation of hydrogen?
How did the name 'hydrogen' originate?
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
Which of the metals copper, zinc, magnesium or sodium would be the most suitable?
Complete and balance the following reaction.
Mg + H2O →_____________ +___________
Complete and balance the following reaction.
Fe + H2O →_____________ +___________
Complete and balance the equation:
[General method]
Reactions of metals with steam
Iron - 3Fe + 4H2O ⇌ ______+ _______ [g]
Account for the following fact:
Potassium and sodium are not used to react with dilute ‘hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.
State the reactant added to hydrogen to obtain the respective product in following case.
Ammonia
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{MgO + H2}\]
