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प्रश्न
For laboratory preparation of hydrogen, give the following:
materials used
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उत्तर
Granulated zinc, dilute HCl or dil. H2SO4
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संबंधित प्रश्न
Match the statements in Column A with those in Column B.
| Column A | Column B |
|
1. A metal which reacts with cold water to from hydrogen. |
1. Reduction |
| 2. A gas which is inflammable and non-supporter of combustion | 2. Hydrogenation |
|
3. A process in which vanspati ghee is prepared from vegitable oils |
3. oxidation |
|
4. The removal ofhydrogen or addition of oxygen |
4. sodium |
| 5. The addition of hydrogen or removal of oxygen | 5. Hydrogen |
For laboratory preparation of hydrogen, give the following:
method of collection
Which test should be made before collecting hydrogen in a gas jar?
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Complete and balance the following reaction.
Al + H2SO4 →_____________ +___________
Give a balanced equation for obtaining hydrogen from?
Steam using a trivalent metal
Give a balanced equation for obtaining hydrogen from?
Steam using a metal – and the reaction is reversible.
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Ca(OH)2 + H2}\]
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Fe3O4 + H2}\]
