NEET2018Physics-Nuclear Physics
NEET 2018 Physics Radioactivity MCQ Question
Type: MCQ-numerical-Medium-Class 12
For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is
A
20
B
10
C
30
D
15
Correct Answer
Option B
Detailed Explanation
After one half-life (10 minutes), 300 nuclei remain. After another half-life (20 minutes), 150 nuclei remain, meaning 450 have decayed.
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