2. Questions Bank
  3. JEE Main & Advanced
  4. Chemistry
  5. Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन

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

  • question_answer
    Half-life of a radioactive disintegration (A \[\to \]B) having rate constant \[231\,{{\sec }^{-1}}\] is              [CPMT 1988]

    A)                 \[3.0\times {{10}^{-2}}\] sec       

    B)                 \[3.0\times {{10}^{-3}}\] sec

    C)                 \[3.3\times {{10}^{-2}}\] sec       

    D)                 \[3.3\times {{10}^{-3}}\] sec

    Correct Answer: B

    Solution :

              \[{{t}_{1/2}}=\frac{0.693}{\lambda }=\frac{0.693}{231\,{{\sec }^{-1}}}=3.0\times {{10}^{-3}}\sec .\]


You need to login to perform this action.
You will be redirected in 3 sec spinner