MCQOPTIONS
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| 1. |
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. | 30 |
| B. | 10 |
| C. | 20 |
| D. | 15 |
| Answer» D. 15 | |