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Nuclei Test - 6...

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  • Question 1
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    Atomic mass of 26Fe is 55.9349u_ { 26 } \mathrm { F } { \mathrm { e } } \text { is } 55.9349 \mathrm { u } and that of H is 1.00783uH \text { is } 1.00783 u.Mass of neutron is 1.00867u1.00867 \mathrm { u } and 1u=931MeV/c2\mathrm { 1u } = 931 \mathrm { MeV } / \mathrm { c } ^ { 2 } then binding energy of 2656Fe_{ 26 }^{ 56 }{ { F }_{ e } } is

  • Question 2
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    Calculate the binding energy per nucleon of 1735C_ { 17 } ^ { 35 } \mathrm { C } \ell nucleus. Given that mass of 1735C_ { 17 } ^ { 35 } \mathrm { C } \ell nucleus =34.98000u,= 34.98000 \mathrm { u } , mass of proton =1.007825u,= 1.007825 \mathrm { u } , mass of neutron =1.008665u= 1.008665 \mathrm { u } and 1u\mathrm { u } is equivalent to 931Mev.\mathrm { Mev. }

  • Question 3
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    Binding energy per nucleon of deutron in 1.112 MeV and binding energy per nucleon of a α\alpha-particle is 7.07 MeV, then in following process, energy Q is :-  2(1H2)2He4+Q2(1_H^2)\rightarrow _2He^4+ Q

  • Question 4
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    After 300 days, the activity of a radioactive sample is 5000 dps( disintegration per second).The activity becomes 2500 dps after another 150 dys.The initial activity of the sample (in dps) is

  • Question 5
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    Human life expectancy is of the order of 

  • Question 6
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    The above is a plot of binding energy per nucleon EbE _ { b } , against the nuclear mass M;A,B,C,D,E,F\mathrm { M } ; \mathrm { A } , \mathrm { B } , \mathrm { C } , \mathrm { D } , \mathrm { E } , \mathrm { F } correspond to different nuclei. Consider four reactions:
    where ε\varepsilon is the energy released? In which reactions is ε\varepsilon positive?

  • Question 7
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    In a hydrogen atom, the binding energy of the electron in the nth state is EnE _ { n } ,  then the frequency of revoulation the electron in the nth orbit is

  • Question 8
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    If abX\begin{matrix} a \\ b \end{matrix}X emits firstly a position, then two α\alpha and two β\beta in the last α\alpha is emitted and finally it converts to cdY\begin{matrix} c \\ d \end{matrix}Y. The correct relation is

  • Question 9
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    A radioactive element XX converts into another stable element Y.Y . Half-life of XX is 2hh . Initially,only XX is present. After time tt , the ratio of atoms of XX and YY is found to be 1:4.1 : 4 . Then tt inhours is 

  • Question 10
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    From the following equations pick out the possible nuclear fusion reactions 

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