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प्रश्न
Give a balanced equation for obtaining hydrogen from?
Steam using a trivalent metal
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उत्तर
To obtain H2 using boiling water and
Steam and trivalent metal Al
2Al + 3H2O → Al2O3 + 3H2
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संबंधित प्रश्न
Fill in the blank
Hydrogen is ..................... than air.
Fill in the blank
Hydrogen is ...................soluble in water.
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 |
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
Correct the following statement:
Hydrogen is separated from CO by passing the mixture through caustic potash solution.
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Potassium- K + H2O → ______+ ______ [g]
Account for the following fact:
Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilutes sulphuric acid.
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Al2(SO4)3 + H2}\]
