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
Heavy water is used as a moderator in a nuclear reactor. The function of the moderator is
to control energy released in the reactor
to absorb neutrons and stop chain reaction
to cool the reactor
to slow down the neutrons to thermal energies
The ratio of the radii of the nuclei 13Al27 and 52Te125 is approximately
6 :10
13 : 52
40 : 177
14 : 73
Energy released in the fission of a single 92U235 nucleus is 200 MeV. The fission rate of a 92U235 filled reactor operating at a power level of 5 W is
1. 56 × 10-10 s -1
1. 56 × 1011 s-1
1. 56 × 10-16 s-1
1. 56 × 10 -17 s-1
In a given reaction:
Radioactive radiations are emitted in the sequence of
α, β, γ
γ, β, α
γ, α, β
β, α, γ
Alpha particles are
2 free protons
helium atoms
singly ionized helium atoms
doubly ionized helium atoms
The binding energy per nucleon is maximum in case of
2He4
26Fe56
56Ba141
92U235
A radioactive element has half-life period 800 yr. After 6400 yr what amount will remain?
1/2
1/16
1/8
1/256
The nucleus 6C12 absorbs an energetic neutron and emits a beta particle ( β ). The resulting nucleus is
7N14
7N13
5B13
6C13
The nucleus 48Cd115, after two successive β-decay will give
46Pa115
49In114
50Sn113
50Sn115
