Metallurgy

Select the correct statement :

The incorrect statement about Hall -Heroult process is

For the formation of which compound in Ellingham diagram \(\Delta G^{\circ}\) becomes more and more negative with increase in temperature?

Sulphide ore on roasting gives a gas \(X\). \(X\) reacts with \(\mathrm{Cl}_2\) in the presence of activated charcoal to give \(Y\). \(Y\) is

Function of potassium ethyl xanthate in froth floatation process is to make the ore

Copper is extracted from copper pyrites by

Among the following, the main reactions occurring in blast furnace during extraction of iron from haematite are
(i) \(\mathrm{Fe}_2 \mathrm{O}_3+3 \mathrm{CO} \rightarrow 2 \mathrm{Fe}+3 \mathrm{CO}_2\)
(ii) $$\mathrm{FeO}+\mathrm{SiO}_2 \r...

Electrolytic refining is used to purify which of the following metals?

The common impurity present in bauxite is

The metal extracted by leaching with a cyanide is