Advertisements
Advertisements
प्रश्न
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Advertisements
उत्तर
Iron has to be heated, and hydrogen thus produced contains impurities such as hydrogen sulphide and sulphur dioxide.
APPEARS IN
संबंधित प्रश्न
For laboratory preparation of hydrogen, give the following:
chemical equation
Why are the following metals not used in the lab. preparation of hydrogen?
aluminium
Complete and balance the following reaction.
Na + H2O →_____________ +___________
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
Starting from hydrogen gas how would you obtain a neutral liquid.
Complete and balance the equation:
[General method]
Reactions of metals with steam
Magnesium - Mg + H2O → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals with steam
Aluminium - 2Al + 3H2O → ______+ _______ [g]
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.
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Al2(SO4)3 + H2}\]
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{NaAlO2 + H2}\]
