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

  • question_answer
    A radioactive substance has a constant activity of 2000 disintegration/minute. The material is separated into two fractions, one of which has an initial activity of 1000 disintegrations per second while the other fraction decays with \[{{t}_{1/2}}\]= 24 hours. The total activity in both samples after 48 hours of separation is                                  [JIPMER 2000]

    A)            2000                                         

    B)            1250

    C)            1000                                         

    D)            1500

    Correct Answer: A

    Solution :

           The problem refers that rate is constant.


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