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प्रश्न
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
विकल्प
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
For laboratory preparation of hydrogen, give the following:
fully-labeled diagram
Why hot concentrated sulphuric acid is not used in the preparation of hydrogen?
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Complete and balance the following reaction.
Ca + H2O →_____________ +___________
Give a balanced equation for obtaining hydrogen from?
Steam using a metal – and the reaction is reversible.
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.
\[\ce{MgO + H2}\]
Give a balanced equation for the following conversion.
\[\ce{KAlO2<-KOH->K2ZnO2}\]
Give a balanced equation for the following conversion.
\[\ce{CO + H2<-H2O->CO2 + H}\]
