Which metal gets accumulates in the body of fish but it cannot kill them.
Nickel
Mercury
Zinc
Copper
The two metals which can be extracted just by heating their sulphides in the air are: (a) sodium and copper (b) copper and aluminium (c) potassium and zinc (d) mercury and copper
Calamine ore can be used to extract one of the following metals. This metal is: (a) copper (b) mercury (c) aluminium (d) zinc
Copper can be extracted by hydrometallurgy but not zinc. Explain.