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Question
Which metal is preferred for the preparation of hydrogen?
from water?
Solution
Reactive metals such as potassium, sodium, and calcium.
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Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
TRUE \ FALSE
reacts with hot water to form copper oxide and hydrogen.
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Complete and balance the following reaction.
Al + H2SO4 →_____________ +___________
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.
Hydrogen sulphide
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Fe3O4 + H2}\]
Give a balanced equation for the following conversion.
\[\ce{CO + H2<-H2O->CO2 + H}\]
Give a balanced equation for the following conversion.
\[\ce{NH3<-H2->H2S}\]
