Related Questions

__________ is used as a flux in the smelting of copper ore like chalcopyrite.
A Coke breeze
B Lime powder
C Silica/quartz
D Dolomite
Which of the following is capable of acting both as an acid flux as well as a basic flux in the metal extraction from its ore?
A Silica
B Lime
C Alumina
D Fluorite
Leaching of uranium ore and gold ore is done in
A Centrifugal extractor
B Pachuka tanks
C Bollman extractor
D None of these
If the iron ore contains clay as an impurity, the flux added during calcination, is
A Clay
B Lime stone
C Argillaceous iron ore
D All the above
During smelting process, the combination of fuel in the furnace
A Forms carbon dioxide
B Carbon dioxide with carbon forms carbon mono-oxide
C Carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2
D All the above
The method of concentrating the ore which makes use of the difference in density between ore and impurities is called
A liquation
B leaching
C levigation
D magnetic separation
Frother is added in the froth floatation cell used in ore beneficiation to stabilise the air bubbles (i.e., froth), which will hold the ore particles, but it does not affect the floatability of minerals. Which of the following is not used as a frother?
A Cresylic acid
B Xanthaies
C Pine oil
D All of the above
Ore concentration by froth floatation utilises the __________ of ore particles.
A Density difference
B Wetting characteristics
C Terminal velocities
D None of these
__________ is used as a flux in the extraction of iron from iron ore (hametite) in blast furnace.
A Bauxite
B Limestone
C Quartz
D Manganese
In "Imperial Smelting Process" for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following :
A Jet of water at high pressure
B Blast of air
C Mixture of water and air
D Rain of molten lead

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