Related Questions

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
Leaching of uranium ore and gold ore is done in
A Centrifugal extractor
B Pachuka tanks
C Bollman extractor
D None of these
The most extensive, commercially useful source of thorium as monazite sand occurs in India at
A Orissa coast
B Travancore coast
C West Bengal coast
D Gujarat coast
Thorium Breeder Reactors are most suitable for India because
A these develop more power
B its technology is simple
C abundance of thorium deposits are available in India
D these can be easily designed
Thorium is mainly used
A For the manufacture of gas mantles
B As a fissile fuel in a nuclear reactor
C In the manufacture of hydrogen bomb
D In the treatment of cancer
Thoria is an expensive refractory material and is radioactive in nature. Thorium oxide is used in the manufacture of
A Segar cones
B Muffles for muffle furnaces
C Insulating bricks
D Crucibles used for melting of high purity metals
Thorium metal
A resembles steel in appearance
B is less hard (in the range of silver)
C is highly ductile
D all A, B & C
Which State of India has the largest reserves of monazite, with a high thorium content?
A Kerala
B Karnataka
C Gujarat
D Maharashtra

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