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Nuclei Test - 68

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Nuclei Test - 68
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  • Question 1
    1 / -0
    Atomic mass of $$_ { 26 } \mathrm { F } { \mathrm { e } } \text { is } 55.9349 \mathrm { u }$$ and that of $$H \text { is } 1.00783 u$$.Mass of neutron is $$1.00867 \mathrm { u }$$ and $$\mathrm { 1u } = 931 \mathrm { MeV } / \mathrm { c } ^ { 2 }$$ then binding energy of $$_{ 26 }^{ 56 }{ { F }_{ e } }$$ is
    Solution

  • Question 2
    1 / -0
    Calculate the binding energy per nucleon of $$_ { 17 } ^ { 35 } \mathrm { C } \ell$$ nucleus. Given that mass of $$_ { 17 } ^ { 35 } \mathrm { C } \ell$$ nucleus $$= 34.98000 \mathrm { u } ,$$ mass of proton $$= 1.007825 \mathrm { u } ,$$ mass of neutron $$= 1.008665 \mathrm { u }$$ and 1$$\mathrm { u }$$ is equivalent to 931$$\mathrm { Mev. }$$
    Solution

  • Question 3
    1 / -0
    Binding energy per nucleon of deutron in 1.112 MeV and binding energy per nucleon of a $$\alpha$$-particle is 7.07 MeV, then in following process, energy Q is :-  $$2(1_H^2)\rightarrow _2He^4+ Q $$
    Solution

  • Question 4
    1 / -0
    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
    Solution

  • Question 5
    1 / -0
    Human life expectancy is of the order of 
    Solution

  • Question 6
    1 / -0
    The above is a plot of binding energy per nucleon $$E _ { b }$$ , against the nuclear mass $$\mathrm { M } ; \mathrm { A } , \mathrm { B } , \mathrm { C } , \mathrm { D } , \mathrm { E } , \mathrm { F }$$ correspond to different nuclei. Consider four reactions:
    where $$\varepsilon$$ is the energy released? In which reactions is $$\varepsilon$$ positive?

    Solution

  • Question 7
    1 / -0
    In a hydrogen atom, the binding energy of the electron in the nth state is $$E _ { n }$$ ,  then the frequency of revoulation the electron in the nth orbit is
    Solution

  • Question 8
    1 / -0
    If $$\begin{matrix} a \\ b \end{matrix}X$$ emits firstly a position, then two $$\alpha$$ and two $$\beta$$ in the last $$\alpha$$ is emitted and finally it converts to $$\begin{matrix} c \\ d \end{matrix}Y$$. The correct relation is
    Solution

  • Question 9
    1 / -0
    A radioactive element $$X$$ converts into another stable element $$Y .$$ Half-life of $$X$$ is 2$$h$$ . Initially,only $$X$$ is present. After time $$t$$ , the ratio of atoms of $$X$$ and $$Y$$ is found to be $$1 : 4 .$$ Then $$t$$ inhours is 
  • Question 10
    1 / -0
    From the following equations pick out the possible nuclear fusion reactions 
    Solution

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