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प्रश्न
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
पर्याय
Na, K, Li
Mg, Ca, Ba
Al, Zn, Pb
Fe, Cu, Ag
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उत्तर
Al, Zn, Pb
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संबंधित प्रश्न
TRUE \ FALSE
reacts with hot water to form copper oxide and hydrogen.
Which test should be made before collecting hydrogen in a gas jar?
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
How would you modify your apparatus to collect dry hydrogen? Which drying agent would you employ for this purpose?
Complete and balance the following reaction.
Al + KOH + H2O→_____________ +___________
‘Hydrogen is obtained by electrolysis of acidified water’.
Answer the following pertaining to the preparation of hydrogen by electrolysis,
Name the electrode –
- through which the current enters the electrolyte.
- at which hydrogen is liberated.
Give reason for the following:
In the preparation of hydrogen by electrolysis of water – the distilled water used is acidified.
Select the correct options for the following statement:
The metallic compound formed when a metal above aluminium in the activity series reacts with steam.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Aluminium - 2Al + 3H2SO4 → ______+ _______ [g]
Give a balanced equation for the following conversion.
\[\ce{ZnO<-H2O->Fe3O4}\]
