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51
__________ gas is normally not used as a coolant in a nuclear reactor, because of its high neutron capture cross-section.
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Answer: Option A
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52
What is the average life of a radioactive atom having a 'half life period' of T?
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Answer: Option A
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53
Which of the following is a non-fissile material?
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Answer: Option D
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54
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
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Answer: Option B
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55
Indian monazite sand contains __________ percent thorium.
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Answer: Option A
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56
Which of the following nuclear materials is fissile?
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Answer: Option C
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57
'Light water' used as a coolant in nuclear reactor is nothing but
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Answer: Option A
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58
The specific heats of three gaseous coolants namely H2, He and CO2 in the increasing order are
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Answer: Option A
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59
The half life period of a radioactive element depends on its
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Answer: Option D
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60
First experimental observation of nuclear fission was done by
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Answer: Option C
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