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

  • question_answer
    The half-life of a radioactive isotope is 3 hours. Value of its disintegration constant is         [BHU 2002]

    A)            0.231 per hr                          

    B)            2.31 per hr

    C)            0.2079 per hr                        

    D)            2.079 per hr

    Correct Answer: A

    Solution :

           \[k=\frac{0.693}{{{t}_{1/2}}}=\frac{0.693}{3hr.}=0.231\]per hrs.


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