NEET Physics Nuclei Questions Solved

Half life of a radio-active substance is 20 minutes. The time between 20% and 80% decay will be 
(a) 20 minutes          (b) 40 minutes
(c) 30 minutes          (d) 25 minutes

To view Explanation, Please buy any of the course from below.
Complete Question Bank + Test Series
Complete Question Bank

Difficulty Level: