Fission and Fusion NEET Questions

Physics - Atoms and Nuclei

Fission and Fusion MCQ Questions


7.
Fission of ²³⁵U is induced by:
A.
Gamma rays only
B.
Fast neutrons only
C.
Slow (thermal) neutrons
D.
Alpha particles only
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ANSWER :
C. Slow (thermal) neutrons
8.
Thermal neutrons have a typical energy of approximately:
A.
13.6 eV
B.
1 keV
C.
0.025 eV
D.
1 MeV
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ANSWER :
C. 0.025 eV
9.
The number of neutrons typically released per fission of ²³⁵U is:
A.
1
B.
10
C.
2 to 3
D.
5 to 6
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ANSWER :
C. 2 to 3
10.
Fission products are typically:
A.
Two unequal-mass nuclei (e.g., A ≈ 95 and A ≈ 140)
B.
One heavy nucleus and many particles
C.
Two equal-mass nuclei
D.
Only protons and electrons
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ANSWER :
A. Two unequal-mass nuclei (e.g., A ≈ 95 and A ≈ 140)
11.
An example of a fissile material is:
A.
²³⁸U
B.
²³⁵U
C.
²H
D.
¹²C
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ANSWER :
B. ²³⁵U
12.
²³⁹Pu (plutonium-239) is produced from:
A.
²³⁸U capturing a neutron, followed by two beta decays
B.
Alpha decay of uranium
C.
²³⁵U fission
D.
Direct mining
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ANSWER :
A. ²³⁸U capturing a neutron, followed by two beta decays