The naturally occurring colourless crystalline form of aluminium oxide (Al2O3) is called
bauxite
limestone
quicklime
corundum
The most abundant metal in the Earth crust
Copper
Magnesium
Aluminium
Gold
Zn + CuSO4 → ZnSO4 + Cu. This is an example for.
Combustion
Displacement
Decomposition
Oxidation
Group I elements are called
halogens
alkali metals
alkaline earth metals
noble gases
The presence of copper ions in compounds can be detected using
electrolysis
Haber process
Litmus test
Flame test
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 white ash produced during burning of magnesium in air is.
Magnesium oxide
Magnesium hydride
Magnesium hydroxide
Magnesium sulphate
2AgNO3(aq)+ Cu(s) → Cu(NO3)(aq)2 + 2 Ag(s)Which metal is more reactive Cu or Ag?
Silver
Oxygen
Nitrogen
