Chemistry
Select from A to G the reactant added, to give the products 1 to 5, in the preparation of hydrogen gas.
A : dilute acid
B : dilute alkali
C : cold water
D : conc. alkali
E : boiling water
F : conc. acid
G : steam
- Ca(OH)2 + H2
- MgO + H2
- Fe3O4 + H2
- Al2(SO4)3 + H2
- NaAlO2 + H2
Related Questions
Explain the term redox reaction with an example involving the reaction of hydrogen sulphide with chlorine.
State what are oxidising and reducing agents. Give examples of oxidising and reducing agents in the gaseous, liquid and solid form. Give two tests each generally answered by oxidising and reducing agents respectively.
Give balanced equations for the following conversions, 1 to 5.
- MgCl2 ⟵ HCl ⟶ FeCl2
- KAlO2 ⟵ KOH ⟶ K2ZnO2
- ZnO ⟵ H2O ⟶ Fe3O4
- CO + H2 ⟵ H2O ⟶ CO2 + H2
- NH3 ⟵ H2 ⟶ H2S
Give reasons for the following:
Nitric acid in the dilute form is not used in the laboratory preparation of hydrogen from metals.