The extraction of gold and Ag involves leaching the metal with
Chloride
Hydroxide
Cyanide
Fluoride
The technique very useful for low boiling metals like Zinc and Mercury is
Distillation
Smelting
Liquation
Concentration
______ is a type of gravity separation.
Hydracilic washing
Magnetic separation
Froth floatation method
The depressant used in an ore containing ZnS and PbS is
KCN
NaOH
NaCl
NaCN
The slag formed in blast furnace is
CaO
CaCO3
CaSiO3
FeO
_________ is the most swignificant thermodynamic concept which help the metallurgical transformations .
Internal energy
Enthalpy
Gibb's energy
Activity
Which scrap is more suitable for reducing the leached copper ore .
Iron
Both Fe and Zn
Zinc
none of these
The diagram which predict the feasibility of thermal reduction of an ore is
Carnot's diagram
Ellingham diagram
All the above
None of the above
In Aluminium thermic process ,Aluminium act as
An oxidizing agent
Neutral substance
Reducing agent
Flux
The method used for the refining of Ti is
Electro refining
Van Arkel method
Mond process
