Verified Solution • 2025–26 Session moderate

QNEET-2020-Ph-729: NEET 2020 Physics - Class 12 NEET-2020-Ph-729 Solution: When a uranium isotope \(_{92}^{235}U\) is bombarded with a…

When a uranium isotope 92235U_{92}^{235}U is bombarded with a neutron it generates 3689Kr_{36}^{89}Kr three neutrons and: 4091Zr_{40}^{91}Zr 36101Kr_{36}^{101}Kr 36103Kr_{36}^{103}Kr 56144Ba_{56}^{144}Ba

Multiple Choice Options

  • A 4091Zr{}_{40}^{91}Zr 40 91 _ Z r
  • B 36101Kr{}_{36}^{101}Kr 36 101 _ Kr
  • C 36103Kr{}_{36}^{103}Kr 36 103 _ Kr
  • D 56144Ba{}_{56}^{144}Ba 56 144 _ B a

Step-by-Step Verified Solution

92 235 U + 0 1 n = 36 89 U + 0 1 n + Z A X Balancing atomic number on both side, we get 92 + 0 = 36 + Z So, Z = 56 Balancing mass number on both side, we get 235 + 1 = 89 + 3 + A So, A = 144 It gives 56 144 B a

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