Related Questions

Given that, 24 carat gold is pure gold, 18 carat gold is 3/4th of pure gold and 20 carat gold is 5/6th of pure gold, the ratio of the pure gold in 18 carat gold to the pure gold in 20 carat gold is -
A 5 : 8
B 10 : 9
C 8 : 5
D 9 : 10
Percentage of natural uranium present in uranium ore found in Jadugoda (Jharkhand) is
A 0.1
B 1
C 3
D 12
Enrichment of uranium is done to increase the concentration of __________ in the natural uranium.
A U-235
B U-233
C U-238
D PU-239
A certain dentist specializes in implanting gold and silver teeth in his patients mouths .He charges $ 650 for a gold tooth an $ 325. for a silver tooth. If his told fees for implanting gold and silver teeth last week were $ 15, 925 in total and he implanted five more gold teeth that silver teeth, how many teeth in total did he implant over the week?
A 33
B 32
C 31
D 34
In a rare coin collection, all coins are either pure gold or pure silver , and there is initially one gold coin for every three silver coins . With the addition of 10 more gold coins to the collection, the ratio of gold coins to silver coins is 1 to 2. Based on this information , how many total coins are there now in this collection (after the acquisition)?
A 40
B 50
C 70
D 90
The 'shanks system' of leaching (i.e., counter-current multiple contact leaching) is used for
A Recovery of tannis from the tree barks and woods
B Leaching sodium nitrate from Chilean nitrate bearing rock
C Both A & B
D Neither A nor B
Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher
A Melting point, hence can be subjected to higher temperature
B Density ; hence core volume for a given power output would be smaller
C Resistance to effects of irradiation
D All of the above
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
A Uranium oxide
B Uranium hexaflouride
C Uranium carbide
D Uranium sulphate
Extraction of uranium from its ore is done using __________ methods.
A chemical
B pyrometallurgical
C electrometallurgical
D physical benefaction
Extraction of uranium from its ore is done by __________ method.
A Chemical
B Pyrometallurgical
C Physical beneficiation
D Electrometallurgical

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