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प्रश्न
Give reason for the following:
The end of the thistle funnel should be dipped under acid.
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उत्तर
The end of the thistle funnel should be dipped under acid so as to prevent the gas from escaping from the thistle funnel.
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संबंधित प्रश्न
Give reason for the following:
Though hydrogen is lighter than air it cannot be collected by downward displacement of air.
Where does hydrogen occur in a free state?
How did the name 'hydrogen' originate?
Why are the following metals not used in the lab preparation of hydrogen?
calcium
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Complete and balance the following reaction.
Zn + H2O →_____________ +___________
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Zinc - Zn + 2HCl → ______ + _______ [g]
State the reactant added to hydrogen to obtain the respective product in following case.
Ammonia
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen sulphide
