metallurgy step 3 beginner level

Tin and lead can be refined by

• Cupellation

• Liquation

• Poling

• None of these

Silver containing lead as an impurity is purified by

• Poling

• Cupellation

• Levigation

• None of these

Purification of red bauxite can be done by

• Serpeck's process

• Baeyer's process

• Sicilian process

• Frasch process

The process of covering iron sheets with a thin layer of zinc is called

• corrosion

• oxidation

• galvanisation

• rusting

In electrolytic refining a thin strip of pure metal is made

• Anode

• Cathode

• Electrolyte

• B & C

volatile metals like Hg, Cd and Zn are generally purified by

• Distillation

• Electrolysis

• Poling

• Cupellation

Poling process not involves in

• reduced SnO2 to Sn

• hydrocarbon gases which reduces the oxide impurities

• uses green poles of wood

• used in the purification of copper (old method)

which of the following metals are refined by liquation process?

• Bi

• Sn

• Pb

• Hg

Select the metals which are refined by distillation process.

• Zn

• Cd

• Hg

• Al

Electrometallurgy is useful in the extraction of

• Na

• K

• Ca

• Fe