The energy equivalent of one atomic mass unit (a.m.u) is :
1.6 x 10-19 J
6.02 x 1023
931 MeV
9.31 MeV
In any fission process the ratio is
less than 1
Greater than 1
Equal to 1
Depends on the mass of parent nucleus
If in a nuclear fusion process, the masses of the fusing nuclei be m1 and m2 and the mass of the resultant nucleus be m3, then
m3 = m1 + m2
m3 = | m1 - m2|
m3 < (m1 + m2)
m3 > (m1 + m2)
The radius of germanium ( Ge) nuclide is measured to be twice the radius of . The number of nucleons in Ge are
73
74
72
75
Solar energy is due to
fusion reaction
fission reaction
combustion reaction
chemical reaction
A radioactive sample with a half-life of 1 month has the label: ‘Activity = 2 microcurie on 1 – 8 – 1991’. What would be its activity two months earlier?
1.0 microcurie
0.5 microcurie
4 microcurie
8 microcurie
The radioactive decay of uranium in the thorium is represented by the equation:
92U238 → 90Th234 + x
What is x ?
An α-particle
An electron
A proton
a neutron
One milligram of matter converted into energy will give :
9 × 105 J
9 × 103 J
90 J
9 × 1010 J
In a fission reaction
the binding energy per nucleon of X and Y is 8.5 MeV whereas of 236U is 7.6 MeV. The total energy liberate will be about
2000 MeV
200 MeV
2 MeV
1 KeV
Which of the following is used as a moderator in nuclear reactors?
Plutonium
Cadmium
Heavy water
Uranium