NEET Physics Nuclei Questions Solved


If a radioactive substance reduces to 116 of its original mass in 40 days, what is its half-life 
(a) 10 days            (b) 20 days
(c) 40 days            (d) None of these

(a) NN0=12n116=124=12nn=4

Also n=tT1/2T1/2=404=10 days

Difficulty Level:

  • 67%
  • 17%
  • 12%
  • 6%
Crack NEET with Online Course - Free Trial (Offer Valid Till August 26, 2019)