CUET · PHYSICS · PYQ PAPER 2025
In the following nuclear reaction,
\( {}^1_0n + {}^{235}_{92}U \rightarrow {}^{140}_{54}Xe + {}^a_bSr + 2{}^1_0n \), we have
- A \(a=38, b=94\)
- B \(a = 94, b = 38\)
- C \(a = 94, b = 40\)
- D \(a = 96, b = 38\)
Answer & Solution
Correct Answer
(B) \(a = 94, b = 38\)
Step-by-step Solution
Detailed explanation
Conservation of mass number: \( 1 + 235 = 140 + a + 2(1) \) \( 236 = 142 + a \) \( a = 94 \) Conservation of atomic number: \( 0 + 92 = 54 + b + 2(0) \) \( 92 = 54 + b \) \( b = 38 \) Thus, \( a = 94, b = 38 \)
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