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Which of the following is a fissionable (fissile) material that sustains fission on absorbing a neutron?
AUranium-235
BUranium-238
CCarbon-12
DHelium-4
Answer & Solution
Correct answer: A. Uranium-235
1. A fissile material sustains fission when it absorbs a neutron.
2. Uranium-235 undergoes such sustained fission and is fissionable.
3. Uranium-238 does not fission on neutron capture; it is non-fissionable.
4. Carbon-12 and helium-4 are stable, not fissile.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 6 Nuclear Physics "Nuclear Physics", p.85_
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