CaO
Na2O2
ZnO
Mn3O4
Reduction to cuprous hydroxide
Complex formation
Increase in pH
The amphoteric nature of Cu(OH)2
Chlorine is passed into aqueous KMnO4 solution
Manganese dioxide is fused with potassium hydroxide in air
Formaldehyde reacts with potassium permanganate in presence of a strong alkali
Potassium permanganate reacts with concentrated sulphuric acid
Blue precipitate of copper hydroxide is obtained
Black precipitate of copper oxide is obtained
A deep blue solution is obtained
No change is observed
They have low melting points
They do not have catalytic
They exhibit variable oxidation states
They exhibit inert pair effect