Chemical Bonding and Molecular Structure

JEE Advanced · Chemistry · 45 past questions

1. Q1 2026 Paper 1

   The correct order of dipole moments for the given species is

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2. Q2 2026 Paper 1

   Consider the following species…

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3. Q3 2026 Paper 2

   The correct order of ONO bond angle in the given species is

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4. Q4 2025 Paper 1

   Regarding the molecular orbital (MO) energy levels for homonuclear diatomic molecules, the INCORRECT…

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5. Q5 2025 Paper 2

   The correct statement(s) about intermolecular forces is(are)

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6. Q6 2024 Paper 1

   The option(s) in which at least three molecules follow Octet Rule is(are)

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7. Q7 2024 Paper 1

   Based on VSEPR model, match the xenon compounds given in List-I with the corresponding geometries and the…

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8. Q8 2023 Paper 2

   The correct molecular orbital diagram for F$_2$ molecule in the ground state is (with a figure)

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9. Q9 2023 Paper 2

   Among [I$_3$]$^+$, [SiO$_4$]$^{4-}$, SO$_2$Cl$_2$, XeF$_2$, SF$_4$, ClF$_3$, Ni(CO)$_4$, XeO$_2$F$_2$…

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10. Q10 2022 Paper 1

    For diatomic molecules, the correct statement(s) about the molecular orbitals formed by the overlap of two…

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11. Q11 2022 Paper 2

    Thermal decomposition of AgNO$_3$ produces two paramagnetic gases. The total number of electrons present in…

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12. Q12 2021 Paper 1

    In the reaction given below, the total number of atoms having $sp^2$ hybridization in the major product **P**… (with a figure)

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13. Q13 2020 Paper 2

    Consider the following compounds in the liquid form… (with a figure)

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14. Q14 2019 Paper 1

    Each of the following options contains a set of four molecules. Identify the option(s) where all four…

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15. Q15 2019 Paper 1

    Among $B_2H_6$, $B_3N_3H_6$, $N_2O$, $N_2O_4$, $H_2S_2O_3$ and $H_2S_2O_8$, the total number of molecules…

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16. Q16 2018 Paper 1

    Among the species given below, the total number of diamagnetic species is ___.…

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17. Q17 2018 Paper 2

    The total number of compounds having at least one bridging oxo group among the molecules given below is ____.…

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18. Q18 2017 Paper 1

    The sum of the number of lone pairs of electrons on each central atom in the following species is…

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19. Q19 2017 Paper 1

    Among H$_2$, He$_2^+$, Li$_2$, Be$_2$, B$_2$, C$_2$, N$_2$, O$_2^-$, and F$_2$, the number of diamagnetic…

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20. Q20 2016 Paper 1

    The compound(s) with TWO lone pairs of electrons on the central atom is(are)

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21. Q21 2016 Paper 2

    According to Molecular Orbital Theory…

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22. Q22 2015 Paper 1

    The number of resonance structures for N is (with a figure)

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23. Q23 2015 Paper 1

    The total number of lone pairs of electrons in N$_2$O$_3$ is

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24. Q24 2015 Paper 1

    Among the triatomic molecules/ions, BeCl$_2$, N$_3^-$, N$_2$O, NO$_2^+$, O$_3$, SCl$_2$, ICl$_2^-$, I$_3^-$…

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25. Q25 2014 Paper 1

    Hydrogen bonding plays a central role in the following phenomena…

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26. Q26 2014 Paper 1

    The pair(s) of reagents that yield paramagnetic species is/are

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27. Q27 2014 Paper 1

    A list of species having the formula $\mathrm{XZ_4}$ is given below.…

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28. Q28 2014 Paper 1

    The total number(s) of stable conformers with non-zero dipole moment for the following compound is (are) (with a figure)

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29. Q29 2014 Paper 2

    Assuming $2s$-$2p$ mixing is **NOT** operative, the paramagnetic species among the following is

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30. Q30 2014 Paper 2

    Match the orbital overlap figures shown in List-I with the description given in List-II and select the… (with a figure)

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31. Q31 2013 Paper 1

    The total number of lone-pairs of electrons in melamine is

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32. Q32 2013 Paper 2

    The correct statement(s) about $O_3$ is(are)

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33. Q33 2012 Paper 1

    In allene ($\mathrm{C_3H_4}$), the type(s) of hybridisation of the carbon atoms is (are)

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34. Q34 2012 Paper 2

    The shape of $XeO_2F_2$ molecule is

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35. Q35 2010 Paper 1

    Based on VSEPR theory, the number of 90 degree F–Br–F angles in BrF$_5$ is

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36. Q36 2010 Paper 2

    The species having pyramidal shape is

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37. Q37 2010 Paper 2

    Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule $B_2$ is

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38. Q38 2009 Paper 1

    Among cellulose, poly(vinyl chloride), nylon and natural rubber, the polymer in which the intermolecular…

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39. Q39 2009 Paper 1

    Match each of the diatomic molecules in Column I with its property/properties in Column II.

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40. Q40 2009 Paper 2

    The correct stability order of the following resonance structures is (with a figure)

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41. Q41 2007 Paper 1

    The species having bond order different from that in CO is

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42. Q42 2007 Paper 1

    Among the following, the paramagnetic compound is

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43. Q43 2007 Paper 1

    The percentage of p-character in the orbitals forming P-P bonds in $P_4$ is

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44. Q44 2007 Paper 1

    STATEMENT-1 : $p$-Hydroxybenzoic acid has a lower boiling point than $o$-hydroxybenzoic acid.…

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45. Q45 2007 Paper 2

    Among the following, the least stable resonance structure is (with a figure)

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