The naturally occurring colourless crystalline form of aluminium oxide (Al2O3) is called
bauxite
limestone
quicklime
corundum
To reduce, Zinc oxide to Zinc, the material used is
Aluminium
Copper
Iron
Coke
The green coating on copper status when exposed to atmosphere for a long time in due to the formation of
Copper hydroxide
Copper (II) carbonate
Copper (II) sulphate
Copper (II) oxide
The presence of copper ions in compounds can be detected using
electrolysis
Haber process
Litmus test
Flame test
The colour of stained glass windows are produced by the presence of metal ions
transition metals ions
alkaline earth metals ions
nobel metal ions
inner transition metal ions
This reaction is called.
Calcination
Decomposition
Quenching
Thermit reaction
Zn + CuSO4 → ZnSO4 + Cu. This is an example for.
Combustion
Displacement
Oxidation
A grey- green gelatinous precipitate formed when iron salts is treated with alkali
Fe(OH)4
FeSO4
Fe(OH)2
FeCl3
Fe2O3 + Al -----> Al2O3 + 2 Fe. The reducing agent in this reaction is.
iron
oxygen
aluminium
heat
