Related Questions

Which of the following metals can not be extracted by pyrometallurgical process from its sulphide ore?
A Copper
B Mercury
C Lead
D None of these
Which of the following is an undesirable property of slag produced during the pyrometallurgical method of metal extraction from its ore?
A High fusibility & fluidity
B High thermal conductivity
C Low density
D High chemical activity
By which of the following processes are metals of high reactivity extracted from purified molten ore?
A Reduction by an appropriate reducing agent
B Roasting
C Electrolysis
D Calcination
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
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
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
Ore concentration by froth floatation utilises the __________ of ore particles.
A Density difference
B Wetting characteristics
C Terminal velocities
D None of these
Leaching of uranium ore and gold ore is done in
A Centrifugal extractor
B Pachuka tanks
C Bollman extractor
D None of these
A metalloid possesses the characteristics of both the metals and non-metals. Which of the following is not a metalloid?
A Arsenic
B Antimony
C Lead
D None of these
Extraction of uranium from its ore is done using __________ methods.
A chemical
B pyrometallurgical
C electrometallurgical
D physical benefaction

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