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Question
Starting from hydrogen gas how would you obtain a neutral liquid.
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Solution
Hydrogen bums quietly in oxygen to produce water (a neutral liquid)
2H2 + O2 → 2H2O
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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
FILL IN THE BLANK
........................... means ‘maker of water’ in Greek.
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with:
A divalent metal
Why are the following metals not used in the lab preparation of hydrogen?
calcium
Complete and balance the following reaction.
Mg + H2O →_____________ +___________
Complete and balance the following reaction.
Al + H2SO4 →_____________ +___________
Complete and balance the equation:
[General method]
Reactions of metals with steam
Zinc - Zn + H2O → ______+ _______ [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.
Hydrogen sulphide
