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Q.

Binding energies of 1H2,2He4,26Fe56  and 92U235 nuclei are 2.22Mev,28.4Mev,  492Mev and 1786MeV respectively which one of the following is more stable?

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a

1H2

b

2He4

c

26Fe56

d

92U235

answer is C.

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Detailed Solution

1H2→2.22MevBEA=2.222=1.11Mev 2He4→28.4MevBEA=28.44=7.1Mev 26Fe56→492MevBEA=49256=8.78Mev 92U235→1786MevBEA=1786235=7.6Mev BEA is more in 26Fe56 Hence it is more stable.
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