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प्रश्न
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
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उत्तर
As sodium is very reactive and reacts with water violently, darts on the surface of water and collection of hydrogen becomes difficult.
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संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Hydrogen burns in oxygen to form
- hydrogen sulphide
- nitrates
- water
- ammonia
Which metal is preferred for the preparation of hydrogen?
from water?
For laboratory preparation of hydrogen, give the following:
fully-labeled diagram
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
Complete and balance the following reaction.
Fe + H2O →_____________ +___________
Starting from hydrogen gas how would you obtain a metal by reduction of its heated oxide.
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.
State the reactant added to hydrogen to obtain the respective product in following case.
Water
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{MgO + H2}\]
