1.

A nuclear reactor generates power at 50% efficiency, by fusion ""_(92)U^(235) into two canal fragments of ""_(6)Pd^(116) with the emission of two gamma rays and three neutrons. The average B.E. per particle of U^(235) and Pd^(116) is 7.2 MeV and 8.2 MeV respectively. The energy released in one fission event is

Answer»

180MeV
190MeV
200MeV
210MeV

Solution :B.E. of nucleous of one `U^(235)" NUCLEUS"=7.2 xx 235=1692MeV`
FISSION reaction is
`""_(92)U^(235)to 2_(46)Pd^(116)+3_(0)n^(1)+2gamma+Q`
B.E. of nucleons of 2 `Pd^(116)" NUCLIE" =2 xx 8.2 xx 116=19.02.2MeV`
Energy released due to mass defect =(1902.4-1692) =210.4MeV
Energy GAINED by `2gamma-"rays"=2 xx 5.2 MeV=10.4 MeV`.
Energy released per fission =(210.4-10.4)=200meV


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