In a given reaction
ZXA → Z+1YA → Z-1KA-4 → Z-1KA-4
Radioactive radiations are emitted in the sequence of
α, β, γ
γ, α, β
β, α, γ
γ, β, α
Solar energy is due to
fusion reaction
combustion reaction
fission reaction
chemical reaction
If the binding energy per nucleon in 3Li7 and 2He4 nuclei are respectively 5.60 MeV and 7.06 MeV, then the energy of proton in the reaction 3Li7 + p → 22He4 is
19.6 MeV
2.4 MeV
8.4 MeV
17.3 MeV
The nucleus 6C12 absorbs an energetic neutron and emits a beta particle (β). The resulting nucleus is
7N14
7N13
5B13
6C13
The most penetrating radiation out of the following is
γ-rays
α-particles
β-rays
χ-rays
Which of the following statements is true for nuclear forces?
They obey the inverse square law of distance.
They obey the inverse third power law of distance.
They are short range forces.
They are equal in strength to electromagnetic forces.
The energy equivalent of one atomic mass unit is
1.6 x 10-19 J
6.02 x 1023 J
931 MeV
9.31 MeV
Atomic weight of boron is 10.81 and it has two isotopes and . Then, the ratio of atoms of and in nature would be
19 : 81
10 : 11
15 : 16
81 : 19
The average binding energy of a nucleon inside an atomic nucleus is about
8 MeV
8 eV
8 J
8 erg
A free neutrons decays into a proton, an electron and
a beta particle
an alpha particle
an antineutrino
an neutrino
