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JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Rate of decay and Half-life

  • question_answer
    If the half-life of an isotope X is 10 years, its decay constant is [DCE 2004]

    A)                 \[6.932\ y{{r}^{-1}}\]     

    B)                 \[0.6932\ y{{r}^{-1}}\]

    C)                 \[0.06932\ y{{r}^{-1}}\] 

    D)                 \[0.006932\ y{{r}^{-1}}\]                

    Correct Answer: C

    Solution :

                    \[K=\frac{0.693}{{{t}_{1/2}}}\];  \[K=\frac{0.693}{10}=0.0693\,y{{r}^{-1}}\]


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