Nuclear Power Engineering
Gas cooling as compared to water cooling of nuclear reactors

Can produce only saturated steam for feeding to power turbine
Is more efficient as gas has a higher specific heat
None of these
Can not attain a high temperature

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Nuclear Power Engineering
Molten sodium (as a coolant in fast breeder reactor)

Can't attain high temperature at normal pressure
None of these
Is not at all corrosive, even at a higher temperature
Is highly radioactive at elevated temperatures and can cause explosion, when it comes in contact with air or water

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