Nuclei

JEE Advanced · Physics · 28 past questions

1. Q1 2023 Paper 1

   List-I shows different radioactive decay processes and List-II provides possible emitted particles. Match…

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2. Q2 2023 Paper 2

   In a radioactive decay process, the activity is defined as $A = -\frac{dN}{dt}$, where $N(t)$ is the number…

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3. Q3 2022 Paper 1

   The minimum kinetic energy needed by an alpha particle to cause the nuclear reaction…

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4. Q4 2022 Paper 1

   The binding energy of nucleons in a nucleus can be affected by the pairwise Coulomb repulsion. Assume that…

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5. Q5 2022 Paper 2

   In a radioactive decay chain reaction, ${}^{230}_{90}$Th nucleus decays into ${}^{214}_{84}$Po nucleus. The…

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6. Q6 2021 Paper 1

   A heavy nucleus $Q$ of half-life 20 minutes undergoes alpha-decay with probability of 60% and beta-decay with…

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7. Q7 2021 Paper 2

   A heavy nucleus $N$, at rest, undergoes fission $N \to P + Q$, where $P$ and $Q$ are two lighter nuclei. Let…

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8. Q8 2020 Paper 1

   As shown schematically in the figure, two vessels contain water solutions (at temperature $T$) of potassium… (with a figure)

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9. Q9 2019 Paper 1

   In a radioactive sample, $^{40}_{19}K$ nuclei either decay into stable $^{40}_{20}Ca$ nuclei with decay…

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10. Q10 2019 Paper 2

    Suppose a $^{226}_{88}Ra$ nucleus at rest and in ground state undergoes $\alpha$-decay to a $^{222}_{86}Rn$…

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11. Q11 2018 Paper 2

    In a radioactive decay chain, $^{232}_{90}$Th nucleus decays to $^{212}_{82}$Pb nucleus. Let $N_\alpha$ and…

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12. Q12 2017 Paper 1

    $^{131}$I is an isotope of Iodine that β decays to an isotope of Xenon with a half-life of 8 days. A small…

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13. Q13 2016 Paper 1

    The isotope ${}^{12}_{5}$B having a mass 12.014 u undergoes $\beta$-decay to ${}^{12}_{6}$C. ${}^{12}_{6}$C…

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14. Q14 2016 Paper 2

    The electrostatic energy of $Z$ protons uniformly distributed throughout a spherical nucleus of radius $R$ is…

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15. Q15 2016 Paper 2

    An accident in a nuclear laboratory resulted in deposition of a certain amount of radioactive material of…

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16. Q16 2015 Paper 1

    A nuclear power plant supplying electrical power to a village uses a radioactive material of half life $T$…

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17. Q17 2015 Paper 1

    Match the nuclear processes given in column I with the appropriate option(s) in column II.

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18. Q18 2015 Paper 2

    A fission reaction is given by…

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19. Q19 2013 Paper 1

    A freshly prepared sample of a radioisotope of half-life 1386 $s$ has activity $10^3$ disintegrations per…

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20. Q20 2013 Paper 2

    Paragraph for Questions 11 and 12…

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21. Q21 2013 Paper 2

    Paragraph for Questions 11 and 12…

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22. Q22 2013 Paper 2

    Match List I of the nuclear processes with List II containing parent nucleus and one of the end products of…

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23. Q23 2011 Paper 1

    The activity of a freshly prepared radioactive sample is $10^{10}$ disintegrations per second, whose mean…

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24. Q24 2010 Paper 2

    To determine the half life of a radioactive element, a student plots a graph of… (with a figure)

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25. Q25 2009 Paper 1

    Paragraph for Question Nos. 53 to 55…

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26. Q26 2009 Paper 1

    Paragraph for Question Nos. 53 to 55…

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27. Q27 2009 Paper 1

    Paragraph for Question Nos. 53 to 55…

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28. Q28 2007 Paper 1

    In the options given below, let $E$ denote the rest mass energy of a nucleus and $n$ a neutron. The correct…

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