Principles of Metallurgy Quiz 3

Cinnabar is an ore of …………

The metal that occur in native form is……………

The most abundant metal in the earth’s crust is ……………..

The oil used in the froth floatation process is……………..

Froth flotation is a method used for the purification of ……………..ore.

The method used for concentration of Galena is ……………..

……………..method is used for concentration of magnetite ore.

During electrolysis of NaCl the substances formed at anode and cathode are ……………..

In extraction of metals in the middle of activity series before reduction they are converted into ……………..

The ore is heated in the presence of oxygen or air below its melting point is called …………….