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| Q. |
Radioactive materials should be kept in the container made of : |
| A. | Fe |
| B. | Al |
| C. | Pb |
| D. | Steel |
| Answer» D. Steel | |
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Explanation: Radioactive materials are first encased in resin or concrete and sealed in steel drums. The drums are then packed into concrete casks and placed in concrete trenches up to 18 metres deep. |
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