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12th Class Chemistry Nuclear Chemistry / नाभिकीय रसायन Question Bank Critical Thinking Nuclear chemistry

  • question_answer
    \[_{92}{{U}^{235}}+n\to \]fission product+neutron\[+3.20\times {{10}^{-11}}J\]. The energy  released when \[1g\] of \[_{92}{{U}^{235}}\] undergoes fission is [CBSE PMT 1997]

    A)            \[12.75\times {{10}^{8}}kJ\]  

    B)            \[18.60\times {{10}^{9}}kJ\]

    C)            \[8.21\times {{10}^{7}}kJ\]    

    D)            \[6.55\times {{10}^{6}}kJ\]

    Correct Answer: C

    Solution :

           1g U-235 \[=\frac{6.023\times {{10}^{23}}}{235}\ atoms\] \[\therefore \] energy released \[=3.2\times {{10}^{-11}}\times \frac{6.023\times {{10}^{23}}}{235}J=8.21\times {{10}^{10}}J\]            \[=8.2\times {{10}^{7}}kJ\].


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