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प्रश्न
For laboratory preparation of hydrogen, give the following:
method of collection
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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.
TRUE \ FALSE
reacts with hot water to form copper oxide and hydrogen.
Where does hydrogen occur in a free state?
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.
Fe + H2O →_____________ +___________
Complete and balance the equation:
[General method]
Reactions of metals with steam
Zinc - Zn + H2O → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Zinc - Zn + 2HCl → ______ + _______ [g]
Name an element whsich reacts violently with water at room temperature.
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Ca(OH)2 + H2}\]
Give a reason for the following.
Granulated zinc is preferred to metallic zinc in the preparation of hydrogen using dilute acid.
