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The numberr of neutrons emitted when ""(...

The numberr of neutrons emitted when `""_(92)""^(235)U` undergoes controlled nuclear fission to `""_(54)""^(142)Xe` and `""_(38)""^(90)Sr` is

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The correct Answer is:
3
`""_(92)U^(235) + ""_(0)n^1 to ""_(54)Xe^(142) + ""_(38)Sr^(90) + y ""_(0)n^1`
`235 + 1 = 142 + 0 + y`
Y = 4 . The number of neutrons emitted are (4-1)=3 . The answer is 3.
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