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Chemical Bonding and Shapes of Molecules

41 questions · Chemistry · IIT JAM
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Chemical Bonding and Shapes of Molecules

41 questions · Chemistry · IIT JAM

  1. Ion-dipole interactions vary with distance (r) as2025 · Q15 · MCQ
  2. According to VSEPR theory, the set(s) of species having trigonal bipyramidal geometry is(are)2025 · Q31 · Multiple correct
  3. The number of species among the following, having bond order of three is ​. N 2​, F 2​, NO +, O 2​−,N2​+, CO, O 2​, O 2​2−2025 · Q53 · Numerical
  4. The shape of SCN− is2024 · Q10 · MCQ
  5. A pair of isosteric compounds is2024 · Q27 · MCQ
  6. B₂ and C₂, respectively, are2024 · Q29 · MCQ
  7. The N–O bond order in [NO]⁻ is ​.2024 · Q48 · Numerical
  8. The bond length of CO is 113 pm and its dipole moment (μ​) is 0.1 D. The charge (in units of electronic charge) on carbon in the CO molecule including its sign is ​. (rounded off to three decimal places)…2024 · Q49 · Numerical
  9. The magnetic moment of O₃ molecule is ​ Bohr magneton (B.M.). (rounded off to the nearest integer) Includes diagram2024 · Q50 · Numerical
  10. The correct order of energy levels of the molecular orbitals of N2​ is2023 · Q29 · MCQ
  11. The diatomic molecule(s) that has/have bond order of one is/are2023 · Q40 · Multiple correct
  12. In the Born-Haber cycle, the heat of formation of CuCl is ​ kJ/mol. [Given: Heat of atomization of Cu = +338 kJ/mol, Ionization energy of Cu = +746 kJ/mol, Heat of atomization of Cl 2​ = +121 kJ/mol, Electron…2023 · Q49 · Numerical
  13. The spin-only magnetic moment of B 2​ molecule is ​μB​. (round off to two decimal places)2023 · Q50 · Numerical
  14. The correct statement about the geometries of BH_{2}^{+} and NH_{2}^{+} based on valence shell electron pair repulsion (VSEPR) theory is2022 · Q19 · MCQ
  15. The stability of adducts H_{3}B·PF_{3}, H_{3}B·NMe_{3}, H_{3}B·CO, H_{3}B·OMe_{2} follows the order2022 · Q22 · MCQ
  16. The conversion of ICl to ICl^{+} involve(s)2022 · Q39 · Multiple correct
  17. The B–B bond order in B_{2} is ​.2022 · Q45 · Numerical
  18. The structure of [XeF_{8}]^{2-} is2022 · Q6 · MCQ
  19. Among the following, the compound that forms the strongest hydrogen bond is2022 · Q7 · MCQ
  20. Hybridization of the central atoms in I₃⁻, ClF₃ and SF₄, respectively, are2021 · Q13 · MCQ
  21. MgO crystallizes as rock salt structure with unit cell length 2.12 Å. From electrostatic model, the calculated lattice energy in kJ mol −1 (rounded off to the nearest integer) is ​. (Given: NA​=6.022×1023 mol−1…2021 · Q44 · Numerical
  22. The geometries of the species [Br3​]+, [Br3​]− and [BrF3​] are, respectively,2020 · Q16 · MCQ
  23. The number of non-bonding electrons present in the frontier molecular orbitals of HF is2020 · Q19 · MCQ
  24. The solid state structure of HF is2020 · Q22 · MCQ
  25. The soft Lewis base(s) is(are)2020 · Q34 · Multiple correct
  26. The *d*-orbitals involved in the hybridization to form square planar and trigonal bipyramidal geometries are, respectively,2020 · Q9 · MCQ
  27. The correct statement regarding the observed magnetic properties of NO, O₂, B₂, and C₂ in their ground state is2019 · Q19 · MCQ
  28. The correct statement(s) about NO₂, NO₂⁺ and CO₂ is /are2019 · Q36 · Multiple correct
  29. The bond order of N₂⁺ ion is ​. (Round off to one decimal place)2019 · Q41 · Numerical
  30. Correct trend in the bond order is2019 · Q5 · MCQ
  31. Consider the following four xenon compounds: XeF₂, XeF₄, XeF₆ and XeO₃ The pair of xenon compounds expected to have non-zero dipole moment is2018 · Q16 · MCQ
  32. Consider the following six solid binary oxides: CaO, Al₂O₃, PbO, Cs₂O, SiO₂ and Sb₂O₃. The pair(s) of ionic oxides is(are)2018 · Q33 · Multiple correct
  33. NaF, KF, MgO and CaO are crystalline solids. They have NaCl structure. Their lattice energies vary in the order2018 · Q4 · MCQ
  34. The coordination number of Al in crystalline AlCl3​ and liquid AlCl3​, respectively, is2017 · Q12 · MCQ
  35. Among the following, the species having see-saw shape is/are2017 · Q32 · Multiple correct
  36. The correct order of bond angles in BF₃, NH₃, NF₃ and PH₃ is2016 · Q23 · MCQ
  37. The bond order of Be₂ molecule is __.2016 · Q45 · Numerical
  38. The potential energy of interaction between two ions in an ionic compound is given by U = 1389.4 [Z₁Z₂ / r/Å] kJ mol⁻¹. Assuming that CaCl₂ is linear molecule of length 5.6 Å, the potential energy for CaCl₂ molecule in kJ mol⁻¹ is __.2016 · Q49 · Numerical
  39. Among the following, the compound that has the lowest degree of ionic character is2016 · Q7 · MCQ
  40. The species having trigonal pyramidal shape is2015 · Q14 · MCQ
  41. The ionic radii of Cs + and Cl − ions are 181 and 167 pm, respectively. The Born exponents for the He, Ne, Ar, Kr and Xe configurations are 5, 7, 9, 10 and 12, respectively. If the value of 4πε0​ANe2​ is 2.45×10−4…2015 · Q51 · Numerical