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Question
Hydrogen is ______ than air.
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Solution
Hydrogen is lighter than air.
RELATED QUESTIONS
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 |
Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
How did the name 'hydrogen' originate?
Complete and balance the following reaction.
Na + H2O →_____________ +___________
Select the correct options for the following statement:
The metallic compound formed when a metal above aluminium in the activity series reacts with steam.
Select the correct options for the following statement:
The product formed on combustion of hydrogen in air is ___.
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Calcium - Ca + H2O → ______+ _______ [g]
Name an element whsich reacts violently with water at room temperature.
How did the name ‘hydrogen’ originate? How does hydrogen occur in the combined state?
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{NaAlO2 + H2}\]
