Argentite is a mineral of
Potassium
Magnesium
Aluminium
Silver
In forth floatation process for the purification of ores the particles of ore float because.
Their surface is not easily wetted by water.
They are light
They are insoluble
They bear electrostatic charge.
Important ore of Mg is
Gypsum
Carnallite
Magnatide
Which of the following is an Epsom salt ?
7CaSO4H2O
BaSO4 2H2O
MgSO47H2O
MgSO4. 2H2O
Nickel can be refined by ________method.
Carbonyl
Zone refining
Chemical
Froth floatation method