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| Q. |
Nuclear fission is caused by the impact of. |
| A. | Proton |
| B. | Electron |
| C. | Neutron |
| D. | (1) and (b) |
| Answer» C. Neutron | |
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Explanation: In such a reaction, free neutrons released by each fission event can trigger yet more events, which in turn release more neutrons and cause more fission. |
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