NEET Physics Nuclei Questions Solved


A sample contains 16 gm of a radioactive material, the half life of which is two days. After 32 days, the amount of radioactive material left in the sample is

(a) Less than 1 mg         (b) 14gm 
(c) 12gm                       (d) 1 gm

(a) Remaining amount

=16×1232/2=16×1216=1212<1 mg

Difficulty Level:

  • 63%
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  • 13%
  • 7%
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