2. Sample Papers
  3. KVPY

KVPY Sample Paper KVPY Stream-SX Model Paper-19

  • question_answer
    The half-life of a radioactive isotope is 3 hours. If the initial mass of the isotope were 256 gm, the mass of it remaining undecayed after 18 hours would be:

    A) 4 gm

    B) 8 gm

    C) 12 gm

    D) 16 gm

    Correct Answer: A

    Solution :

    \[\frac{256}{{{2}^{6}}}=\frac{256}{64}=4.\]


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