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Chapter 18 Atomic and Nuclear Physics-21
1.
Who observed nuclear fission first in 1939?
a) (a) Both b and c
b) (d) Marie Curie
c) (b) Otto Hahn
d) (c) Fritz Strassman
2.
When nuclear fission was first observed by Otto Hahn?
a) 1939
b) 1399
c) 1993
d) 1933
3.
Who observed nuclear fission first in 1939?
a) Otto Hahn
b) Marie Curie
c) Marie Pierre
d) Democritus
4.
When nuclear fission was first observed by Fritz Strassman?
a) 1933
b) 1993
c) 1399
d) 1939
5.
The process by which lighter nuclei fuse together to form a heavy nucleus is known as…………………?
a) Nuclear fission
b) Nuclear fusion
c) Radioactivity
d) Electron activity
6.
Who observed nuclear fission first in 1939?
a) Marie Pierre
b) Marie Curie
c) Democritus
d) Fritz Strassman
7.
Into how many fragments uranium nucleus was split into, after absorbing a slow moving neutron?
a) 3
b) 1
c) 4
d) 2
8.
On the average, how many neutrons are released per event of nuclear fission reaction of U-235?
a) 2.47
b) 3.47
c) 1.74
d) 2.74
9.
How much energy is released per fission event?
a) 20 M eV
b) 200 M eV
c) 2000 M eV
d) 2 M eV
10.
Into how many fragments uranium nucleus was split into, after absorbing a low-energy neutron?
a) 4
b) 2
c) 3
d) 1
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