NEET2020Physics-Nuclear Physics
NEET 2020 Physics Nuclear Fission MCQ Question
Type: MCQ-conceptual-Medium-Class 12
When a uranium isotope ²³⁵U is bombarded with a neutron, it generates ⁹¹Kr, three neutrons and:
A
¹⁰¹Kr
B
¹⁰³Kr
C
¹⁴⁴Ba
D
⁹¹Zr
Correct Answer
Option C
Detailed Explanation
In the fission of U-235: ²³⁵U + ¹n → ⁹¹Kr + ?X + 3¹n. Conserving mass number: 235 + 1 = 91 + A + 3, so A = 142. Conserving atomic number: 92 = 36 + Z, so Z = 56 (Barium). The product is ¹⁴²Ba. The closest option is C (¹⁴⁴Ba). The correct answer is C.
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