Chemical Bonding and Molecular Structure JEE Main 2024 PYQs PDF

Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A...

Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q1. In which one of the following pairs the central atoms exhibit sp hybridization ? 2 09 Apr 2024 (M) (1) H 2O and NO 2 (2) BF 3 and NO − 2 (3) NH and H − 2 2O (4) NH and BF − 2 3 Q2. The incorrect statement regarding ethyne is 09 Apr 2024 (E) (1) The C − C bonds in ethyne is shorter than that in ethene (2) Both carbons are sp hybridised (3) Ethyne is linear (4) The corbon - carbon bonds in ethyne is weaker than that in ethene Q3. The total number of species from the following in which one unpaired electron is present, is _______ N2 , O2 , C − 2 ,O − 2 ,O 2− 2 ,H + 2 , CN − , He + 2 09 Apr 2024 (M) Q4. The correct increasing order for bond angles among BF 3, PF 3 and ClF is : 3 09 Apr 2024 (E) (1) BF 3 < PF 3 < ClF 3 (2) ClF 3 < PF 3 < BF 3 (3) PF 3 < BF 3 < ClF 3 (4) BF 3 = PF 3 < ClF 3 Q5. Total number of electrons present in (π ∗ ) molecular orbitals of O 2, O2 + and O is _______. − 2 09 Apr 2024 (E) Q6. Number of molecules from the following which are exceptions to octet rule is ______ CO 2 , NO 2 , H 2 SO 4 , BF 3 , CH 4 , SiF 4 , ClO 2 , PCl 5 , BeF 2 , C 2 H 6 , CHCl 3 , CBr 4 08 Apr 2024 (M) Q7. Match List I with List II List-I List-II (Molecule) (Shape) A. NH 3 I. Square pyramid B. BrF 5 II. Tetrahedral C. PCl 5 III. Trigonal pyramidal D. CH 4 IV. Trigonal bipyramidal Choose the correct answer from the options given below: 08 Apr 2024 (M) (1) A-II, B-IV, C-I, D-III (2) A-III, B-I, C-IV, D-II (3) A-IV, B-III, C-I, D-II (4) A-III, B-IV, C-I, D-II Q8. The shape of carbocation is : 08 Apr 2024 (E) (1) diagonal pyramidal (2) trigonal planar (3) tetrahedral (4) diagonal Q9. Given below are two statements: Statement I: N(CH 3 )3 and P(CH 3 )3 can act as ligands to form transition metal complexes. Statement II: As N and P are from same group, the nature of bonding of N(CH 3 )3 and P(CH 3 )3 is always same with transition metals. In the light of the above statements, choose the most appropriate answer from the options given below: 08 Apr 2024 (M) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 1 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo (1) Statement I is correct but Statement II is incorrect. (2) Statement I is incorrect but Statement II is correct. (3) Both Statement I and Statement II are correct. (4) Both Statement I and Statement II are incorrect. Q10. Number of molecules having bond order 2 from the following molecules is ________ C 2 , O 2 , Be 2 , Li 2 , Ne 2 , N 2 , He 2 08 Apr 2024 (E) Q11. When ψ and ψ are the wave functions of atomic orbitals, then σ is represented by : A B ∗ 08 Apr 2024 (E) (1) ψ A + 2ψ B (2) ψ A − ψB (3) ψ A + ψB (4) ψ A − 2ψ B Q12. Match List I with List II List - I List - II (Molecule/Species) (Property/Shape) A. SO 2 Cl 2 I. Paramagnetic B. NO II. Diamagnetic − C. NO III. Tetrahedral 2 − D. I IV. Linear 3 Choose the correct answer from the options given below: 06 Apr 2024 (M) (1) A-II, B-III, C-I, D-IV (2) A-III, B-I, C-II, D-IV (3) A-IV, B-I, C-III, D-II (4) A-III, B-IV, C-II, D-I Q13. Match List I with List II List - I List - II (Hybridization) (Orientation in Space) 3 A. sp I. Trigonal bipyramidal 2 B. dsp II. Octahedral 3 C. sp d III. Tetrahedral 3 2 D. sp d IV. Square planar Choose the correct answer from the options given below: 06 Apr 2024 (M) (1) A-IV, B-III, C-I, D-II (2) A-III, B-IV, C-I, D-II (3) A-III, B-I, C-IV, D-II (4) A-II, B-I, C-IV, D-III Q14. Match List I with List II List - I List - II (Compound/Species) (Shape/Geometry) A. SF 4 I. Tetrahedral B. BrF 3 II. Pyramidal − C. BrO III. See saw 3 + D. NH IV. Bent T-Shape 4 Choose the correct answer from the options given below: 06 Apr 2024 (M) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 2 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo (1) A-II, B-III, C-I, D-IV (2) A-II, B-IV, C-III, D-I (3) A-III, B-IV, C-II, D-I (4) A-III, B-II, C-IV, D-I Q15. Total number of species from the following with central atom utilising sp hybrid orbitals for bonding is 2 _____. NH 3, SO 2 , SiO 2 , BeCl 2 , C 2 H 2 , C 2 H 4 , BCl 3 , HCHO, C 6 H 6 , BF 3 , C 2 H 4 Cl 2 06 Apr 2024 (E) Q16. Number of molecules from the following which can exhibit hydrogen bonding is _______ (nearest integer) 06 Apr 2024 (M) Q17. Number of compounds from the following with zero dipole moment is ______ HF, H 2 , H 2 S, CO 2 , NH 3 , BF 3 , CH 4 , CHCl 3 , SiF 4 , H 2 O, BeF 2 05 Apr 2024 (E) Q18. In the lewis dot structure for NO , total number of valence electrons around nitrogen is _______ − 2 05 Apr 2024 (M) Q19. Match List I with List II List - I List - II (A) ICl (I) T - shape (B) ICl 3 (II) pyramidal (C) ClF 5 (III) Pentagonal bipyramidal (D) IF 7 (IV) Linear Choose the correct answer from the options given below : 05 Apr 2024 (E) (1) (A)-(IV), (B)-(I), (C)-(II), (D)-(III) (2) (A)-(I), (B)-(IV), (C)-(III), (D)-(II) (3) (A)-(IV), (B)-(III), (C)-(II), (D)-(I) (4) (A)-(I), (B)-(III), (C)-(II), (D)-(IV) Q20. Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : NH and NF molecule have pyramidal shape with a lone pair of electrons on nitrogen atom. 3 3 The resultant dipole moment of NH is greater than that of NF. 3 3 Reason (R) : In NH , the orbital dipole due to lone pair is in the same direction as the resultant dipole moment 3 of the N − H bonds. F is the most electronegative element. In the light of the above statements, choose the correct answer from the options given below : 05 Apr 2024 (E) (1) Both (A) and (R) are true and (R) is the correct explanation of (A) (2) (A) is false but (R) is true (3) Both (A) and (R) are true but (R) is NOT the correct explanation of (A) (4) (A) is true but (R) is false Q21. Number of molecules/ions from the following in which the central atom is involved in sp hybridization is 3 ______ NO − 3 , BCl 3 , ClO − 2 , ClO 3 04 Apr 2024 (M) (1) 4 (2) 3 (3) 2 (4) 1 For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 3 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q22. Number of molecules/species from the following having one unpaired electron is O2 , O −1 2 , NO, CN −1 ,O 2− 2 04 Apr 2024 (M) Q23. Which one of the following molecules has maximum dipole moment? 04 Apr 2024 (M) (1) NF 3 (2) CH 4 (3) PF 5 (4) NH 3 Q24. Number of compounds / species from the following with non-zero dipole moment is ______ BeCl 2 , BCl 3 , NF 3 , XeF 4 , CCl 4 , H 2 O, H 2 S, HBr, CO 2 , H 2 , HCl 04 Apr 2024 (E) Q25. The correct statement/s about Hydrogen bonding is/are A. Hydrogen bonding exists when H is covalently bonded to the highly electro negative atom. B. Intermolecular H bonding is present in o-nitro phenol C. Intramolecular H bonding is present in HF. D. The magnitude of H bonding depends on the physical state of the compound. E. H-bonding has powerful effect on the structure and properties of compounds Choose the correct answer from the options given below: 04 Apr 2024 (E) (1) A, B, D only (2) A, D, E only (3) A only (4) A, B, C only Q26. The number of species from the following that have pyramidal geometry around the central atom is _______. S2 O 2− 3 , SO 2− 4 , SO 2− 3 , S2 O 2− 7 04 Apr 2024 (E) (1) 4 (2) 3 (3) 2 (4) 1 Q27. Arrange the bonds in order of increasing ionic character in the molecules. LiF, K 2 O, N 2 , SO 2 and ClF 3. 01 Feb 2024 (M) (1) ClF 3 < N 2 < SO 2 < K 2 O < LiF (2) LiF < K 2O < ClF 3 < SO 2 < N 2 (3) N 2 < SO 2 < ClF 3 < K 2 O < LiF (4) N 2 < ClF 3 < SO 2 < K 2 O < LiF Q28. The number of molecules/ion/s having trigonal bipyramidal shape is ……... PF 5 , BrF 5 , PCl 5 , [PtCl 4 ] 2− , BF 3 , Fe(CO) 5 01 Feb 2024 (M) Q29. Given below are two statements : Statement (I) : A π bonding MO has lower electron density above and below the inter-nuclear axis. Statement (II) : The π antibonding MO has a node between the nuclei. * In light of the above statements, choose the most appropriate answer from the options given below: 01 Feb 2024 (E) (1) Both Statement I and Statement II are false (2) Both Statement I and Statement II are true (3) Statement I is false but Statement II is true (4) Statement I is true but Statement II is false Q30. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : PH has lower boiling point than NH 3 3. Reason (R) : In liquid state NH molecules are associated through Vander Waal's forces, but PH molecules 3 3 are associated through hydrogen bonding. For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 4 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo In the light of the above statements, choose the most appropriate answer from the options given below: 01 Feb 2024 (M) (1) Both (A) and (R) are correct and (R) is not the correct explanation of (A) (2) (A) is not correct but (R) is correct (3) Both (A) and (R) are correct but (R) is the correct explanation of (A) (4) (A) is correct but (R) is not correct Q31. Select the compound from the following that will show intramolecular hydrogen bonding. 01 Feb 2024 (E) (1) H 2O (2) NH 3 (3) C 2 H 5 OH (4) Q32. Which of the following is least ionic? 31 Jan 2024 (E) (1) BaCl 2 (2) AgCl (3) KCl (4) CoCl 2 Q33. The number of species from the following in which the central atom uses sp hybrid orbitals in its bonding is 3 _________. NH 3 , SO 2 , SiO 2 , BeCl 2 , CO 2 , H 2 O, CH 4 , BF 3 31 Jan 2024 (M) Q34. A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is 1A, then fractional charge on each o atom is _____ ×10 −1 esu. (Given 1D = 10 −18 esu cm ) 31 Jan 2024 (E) Q35. The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different symmetry about the molecular axis Choose the most appropriate from the options given below: 31 Jan 2024 (M) (1) A, B, C only (2) A and C only (3) B, C, D only (4) B and D only Q36. Match List - I with List-II List I (Molecule) List II (Shape) A. BrF 5 i. T-shape B. H2 O ii. See saw C. ClF 3 iii. Bent D. SF 4 iv. Square pyramidal 30 Jan 2024 (M) (1) (A)-I, (B)-II, (C)-IV, (D)-III (2) (A) -II, (B)-I, (C)-III, (D)-IV (3) (A)-III, (B)-IV, (C)-I, (D)-II (4) (A)-IV, (B)-III, (C)-I, (D)-II Q37. The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 5 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo 30 Jan 2024 (M) Q38. Given below are two statements: Statement-I: Since fluorine is more electronegative than nitrogen, the net dipole moment of NF is greater than 3 NH 3. Statement-II: In NH , the orbital dipole due to lone pair and the dipole moment of NH bonds are in opposite 3 direction, but in NF the orbital dipole due to lone pair and dipole moments of N-F bonds are in same 3 direction. In the light of the above statements. Choose the most appropriate from the options given below. 30 Jan 2024 (E) (1) Statement I is true but Statement II is false. (2) Both Statement I and Statement II are false. (3) Both statement I and Statement II is are true. (4) Statement I is false but Statement II is are true. Q39. Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : H 2 Te is more acidic than H 2 S. Reason R: Bond dissociation enthalpy of H 2 Te is lower than H 2. S In the light of the above statements. Choose the most appropriate from the options given below. 30 Jan 2024 (E) (1) Both A and R are true but R is NOT the correct (2) Both A and R are true and R is the correct explanation of A. explanation of A. (3) A is false but R is true. (4) A is true but R is false. Q40. Number of compounds with one lone pair of electrons on central atom amongst following is _ O 3 , H 2 O, SF 4 , ClF 3 , NH 3 , BrF 5 , XeF 4 29 Jan 2024 (M) Q41. The number of species from the following which are paramagnetic and with bond order equal to one is H 2 , He + 2 ,O + 2 ,N 2− 2 ,O 2− 2 , F 2 , Ne + 2 , B2 29 Jan 2024 (M) Q42. The total number of molccules with zero dipole moment among CH 4, BF 3 , H 2 O, HF, NH 3 , CO 2 and SO is 2 ______. 29 Jan 2024 (E) Q43. The total number of 'Sigma' and Pi bonds in 2-formylhex-4-enoic acid is 29 Jan 2024 (E) Q44. The total number of anti bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecule is _____________. 29 Jan 2024 (E) Q45. Sum of bond order of CO and NO is + 27 Jan 2024 (M) Q46. Choose the polar molecule from the following : 27 Jan 2024 (M) (1) CCl 4 (2) CO 2 (3) CH 2 = CH 2 (4) CHCl 3 Q47. The number of non-polar molecules from the following is HF, H 2 O, SO 2 , H 2 , CO 2 , CH 4 , NH 3 , HCl, CHCl 3 , BF 3 27 Jan 2024 (E) Q48. Consider the following statement For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 6 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo (A) NF 3 molecules has a trigonal planar structure. &nbps;(B) Bond Length of N2 is shorter than O2. &nbps; (C) Isoelectronic molecules or ions have identical bond order. &nbps;(D) Dipole moment of H 2S is higher than that of water molecule. Choose the correct answer from the options given below: 15 Apr 2023 (M) (1) (A) and (B) are correct (2) (A) and (D) are correct (3) (C) and (D) are correct (4) (B) and (C) are correct Q49. Given below are two statements : Statement I : SO and H 2 2O both possess V-shaped structure Statement II : The bond angle of SO is less than that of H 2 2O. In the light of the above statements, choose the most appropriate answer from the options given below: 13 Apr 2023 (E) (1) Both Statement I and Statement II are incorrect (2) Both Statement I and Statement II are correct (3) Statement I is incorrect but Statement II is (4) Statement I is correct but Statement II is correct incorrect Q50. ClF at room temperature is a 5 13 Apr 2023 (M) (1) Colourless liquid with trigonal bipyramidal geometry (2) Colourless gas with square pyramidal geometry (3) Colourless gas with trigonal bipyramidal geometry (4) Colourless liquid with square pyramidal geometry Q51. In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one? 13 Apr 2023 (M) (1) O 2 → O + 2 (2) O 2 → O 2− 2 (3) NO → NO + (4) N 2 → N + 2 Q52. Among the following compounds, the one which shows highest dipole moment is 13 Apr 2023 (M) (1) (2) (3) (4) Q53. Given below are two statements: Statement I: SbCl is more covalent than SbCl 5 3 Statement II: The higher oxides of halogens also tend to be more stable than the lower ones. In the light of the above statements, choose the most appropriate answer from the options given below. 12 Apr 2023 (M) (1) Statement I is incorrect but statement II is correct (2) Both Statement I and Statement II are incorrect (3) Both Statement I and Statement II are correct (4) Statement I is correct but statement II is incorrect Q54. The bond order and magnetic property of acetylide ion are same as that of 12 Apr 2023 (M) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 7 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo (1) O 2 + (2) N 2 + (3) NO + (4) O 2 − Q55. Match List-I with List-II: List-I Species List-II Geometry/Shape A. H3 O + I. Tetrahedral B. Acetylide anion II. Linear C. NH + 4 III. Pyramidal D. ClO − 2 IV. Bent Choose the correct answer from the options given below: 11 Apr 2023 (M) (1) A(III), B(IV), C(I), D(II) (2) A(III), B(I), C(II), D(IV) (3) A(III), B(II), C(I), D(IV) (4) A(III), B(IV), C(II), D(I) Q56. The maximum number of lone pairs of electron on the central atom from the following species is...... ClO 3 − , XeF 4 , SF 4 and l 3 − 11 Apr 2023 (E) Q57. Which one of the following pairs is an example of polar molecular solids? 11 Apr 2023 (E) (1) SO 2( s), CO 2 ( s) (2) SO 2( s), NH 3 ( s) (3) MgO(s), SO 2 (s) (4) HCl(s), AlN(s) Q58. The number of bent-shaped molecule/s from the following is ______ N − 3 , NO − 2 , I − 3 , O3 , SO 2 10 Apr 2023 (M) Q59. The sum of lone pairs present on the central atom of the interhalogen IF and IF is ______ 10 Apr 2023 (M) 5 7 Q60. The number of molecules from the following which contain only two lone pair of electrons is _____________ H 2 O, N 2 , CO, XeF 4 , NH 3 , NO, CO 2 , F 2 10 Apr 2023 (E) Q61. The pair from the following pairs having both compounds with net non-zero dipole moment is 10 Apr 2023 (M) (1) 1, 4-Dichlorobenzene, 1, 3-Dichlorobenzene (2) cis-butene, trans-butene (3) CH 2 Cl 2 , CHCl 3 (4) Benzene, anisidine Q62. The number of species trom the following carrying a single lone pair on central atom Xenon is XeF + 5 , XeO 3 , XeO 2 F 2 , XeF − 5 , XeO 3 F 2 , XeOF 4 , XeF 4 08 Apr 2023 (E) Q63. The number of following factors which affect the percent covalent character of the ionic bond is______ A) Polarising power of cation >B) Extent of distortion of anion C) Polarisability of the anion< D) Polarising power of anion 08 Apr 2023 (M) Q64. Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R. Assertion A : Butan–1–ol has higher boiling point than ethoxyethane. Reason R : Extensive hydrogen bonding leads to stronger association of molecules. In the light of the above statements, choose the correct answer from the options given below : 08 Apr 2023 (M) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 8 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo (1) A is true but R is false (2) Both A and R are true and R is the correct explanation of A (3) Both A and R are true but R is not the correct explanation of A (4) A is false but R is true Q65. The number of species from the following which have square pyramidal structure is _______ PF 5 , BrF − 4 , IF 5 , BrF 5 , XeOF 4 , ICl − 4 06 Apr 2023 (M) Q66. The number of species having a square planar shape from the following is XeF 4 , SF 4 , SiF 4 , BF 4 − , BrF 4 − , [Cu (NH 3 ) ] 4 2+ , [FeCl 4 ] 2− , [PtCl 4 ] 2− 06 Apr 2023 (E) Q67. In an ice crystal, each water molecule is hydrogen bonded to _____ neighbouring molecules. 06 Apr 2023 (E) Q68. Match List I with List II List I List II A. XeF 4 I.See-saw B. SF 4 II. Square planar C. NH + 4 III. Bent T− shaped D.BrF 3 IV. Tetrahedral Choose the correct answer from the options given below : 31 Jan 2023 (M) (1) A − IV, B − III, C − II, D − I (2) A − II, B − I, C − III, D − IV (3) A − IV, B − I, C − II, D − III (4) A − II, B − I, C − IV, D − III Q69. Amongst the following, the number of species having the linear shape is XeF 2 , I + 3 , C3 O2 , I − 3 , CO 2 , SO 2 , BeCl 2 and BCl ⊖ 2 31 Jan 2023 (E) Q70. Match List I with List II List II List I (No. of lone pairs of e − (molecules/ions) on central atom) (A) IF 7 I. Three (B) ICl − 4 II. One (C) XeF 6 III. Two (D) XeF 2 IV. Zero Choose the correct answer from the options given below: 30 Jan 2023 (M) (1) A - II, B - III, C - IV, D - I (2) A - IV, B - III, C - II, D - I (3) A - II, B - I, C - IV, D - III (4) A - IV, B - I, C - II, D - III Q71. For OF molecule consider the following: 2 (A) Number of lone pairs on oxygen is 2. (B) FOF angle is less than 104. 5°. (C) Oxidation state of O is −2. (D) Molecule is bent 'V' shaped. (E) Molecular geometry is linear. Correct options are: 30 Jan 2023 (M) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 9 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo (1) C, D, E only (2) B, E, A only (3) A, C, D only (4) A, B, D only Q72. According to MO theory the bond orders for O 2 2− , CO and NO respectively, are + 29 Jan 2023 (E) (1) 1, 3 and 3 (2) 1, 3 and 2 (3) 1, 2 and 3 (4) 2, 3 and 3 Q73. The number of molecules or ions from the following, which do not have odd number of electrons are _____. (A) NO (B) ICl 2 − 4 (C) BrF (D) ClO (E) NO 3 2 + 2 (F) NO 29 Jan 2023 (M) Q74. The bond dissociation energy is highest for 29 Jan 2023 (M) (1) Cl 2 (2) I 2 (3) Br 2 (4) F 2 Q75. The total number of lone pairs of electrons on oxygen atoms of ozone is 25 Jan 2023 (M) Q76. Statement I:- Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing towards the positive centre. Statement II:- The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules. In the light of the above statements, choose the most appropriate answer from the options given below:- 25 Jan 2023 (E) (1) Both Statement I and Statement II are correct. (2) Statement I is incorrect but Statement II is correct. (3) Both Statement I and Statement II are incorrect. (4) Statement I is correct but Statement II is incorrect. Q77. Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice C. Impure water 24 Jan 2023 (M) (1) A = B > C (2) B > A > C (3) C > B > A (4) A > B > C Q78. What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : N2 , N + 2 , O2 , O + 2 ? 24 Jan 2023 (E) (1) 0, 1, 2, 1 (2) 2, 1, 2, 1 (3) 0, 1, 0, 1 (4) 2, 1, 0, 1 Q79. Order of Covalent bond; A. KF > KI; LiF > KF B. KF < KI; LiF > KF C. SnCl 4 > SnCl 2 ; CuCl > NaCl D. LiF > KF; CuCl > NaCl E. KF < KI; CuCl > NaCl 24 Jan 2023 (M) (1) C, E Only (2) B, C Only (3) B, C, E Only (4) A, B Only Q80. Sum of π-bonds present in peroxodisulphuric acid and pyrosulphuric acid is 24 Jan 2023 (E) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 10 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q81. Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule? 29 Jul 2022 (M) (1) BCl and SF3 6 (2) NO and H 2 SO 4 (3) SF and H 6 2 SO 4 (4) BCl and NO 3 Q82. Number of lone pairs of electrons in the central atom of SCl 2, O 3 , ClF 3 and SF , respectively, are 6 29 Jul 2022 (M) (1) 0, 1, 2 & 2 (2) 2, 1, 2 & 0 (3) 1, 2, 2 & 0 (4) None of these Q83. Consider, PF 5, BrF 5 , PCl 3 , SF 6 , [ICl 4 ] − , ClF 3 and IF 5 Amongst the above molecule(s) ion(s), the number of molecule(s)/ion(s) having sp 3 d 2 hybridisation is 29 Jul 2022 (E) Q84. The number of paramagnetic species among the following is B 2, Li 2 , C 2 , C − 2 ,O 2− 2 ,O + 2 and He + 2 28 Jul 2022 (M) Q85. Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Zero orbital overlap is an out of phase overlap. Reason R : It results due to different orientation/ direction of approach of orbitals. In the light of the above statements. Choose the correct answer from the options given below 28 Jul 2022 (E) (1) Both A and R are true and R is the correct explanation of A (2) Both A and R are true but R is NOT the correct explanation of A (3) A is true but R is false (4) A is false but R is true Q86. The number of molecule(s) or ion(s) from the following having non-planar structure is______. NO − 3 , H 2 O 2 , BF 3 , PCl 3 , XeF 4 , SF 4, XeO 3 , PH + 4 , SO 3 , [Al (OH) ] 4 − 27 Jul 2022 (E) Q87. Amongst the following the number of oxide(s) which are paramagnetic in nature is Na 2 O, KO 2 , NO 2 , N 2 O, ClO 2 , NO, SO 2 , Cl 2 O 27 Jul 2022 (M) Q88. According to MO theory, number of species/ions from the following having identical bond order is____ CN − , NO + , O2 , O + 2 ,O 2+ 2 27 Jul 2022 (M) Q89. Given below are two statements. Statement I : O 2 , Cu 2+ and Fe 3+ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field. Statement II : NaCl and H 2O are weakly magnetized in opposite direction to magnetic field. In the light of the above statements, choose the most appropriate answer form the options given below 27 Jul 2022 (M) (1) Both Statement I and Statement II are correct. (2) Both Statement I and Statement II are incorrect. (3) Statement I is correct but Statement II is (4) Statement I is incorrect but Statement II is incorrect. correct. For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 11 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q90. Match List-I with List-II List-I List-II A Ψ MO = Ψ A − Ψ B I Dipole moment B μ=Q×r II Bonding molecular orbital C N b −N a 2 III Anti-bonding molecualr orbital D Ψ MO = Ψ A + Ψ B IV Bond order 27 Jul 2022 (E) (1) A − II, B − I, C − IV, D − III (2) A − III, B − IV, C − I, D − II (3) A − III, B − I, C − IV, D − II (4) A − III, B − IV, C − II, D − I Q91. Match List - I with List - II. List-I List-II (Compound) (Shape) A BrF 5 I bent B [CrF 6 ] 3− II square pyramidal C O3 III trigonal bipyramidal D PCl 5 IV octahedral Choose the correct answer from the options given below 26 Jul 2022 (M) (1) (A) − (I), (B) − (II), (C) − (III), (D) − (IV) (2) (A) − (IV), (B) − (III), (C) − (II), (D) − (I) (3) (A) − (II), (B) − (IV ), (C) − (I), (D) − (III) (4) (A) − (III), (B) − (IV), (C) − (II), (D) − (I) Q92. Arrange the following in increasing order of their covalent character. (A) CaF (B) CaCl (C) CaBr (D) CaI 2 2 2 2 Choose the correct answer from the options given below. 26 Jul 2022 (E) (1) B < A < C < D (2) A < B < C < D (3) A < B < D < C (4) A < C < B < D Q93. Match List I with List II List-I List-II A XeO 3 I sp 3 d ; linear B XeF 2 II sp 3 ; pyramidal C XeOF 4 III sp 3 d 3 ; distorted octahedral D XeF 6 IV sp 3 d 2 ; square pyramidal Choose the correct answer from the options given below 25 Jul 2022 (E) (1) A − II, B − IV, C − III, D − I (2) A − IV, B − II, C − III, D − I (3) A − II, B − I, C − IV, D − III (4) A − IV, B − II, C − I, D − III Q94. The sum of number of lone pairs of electrons present on the central atoms of XeO 3, XeOF 4 and XeF is 6 25 Jul 2022 (E) Q95. Among the following species N 2, N + 2 ,N − 2 ,N 2− 2 , O2 , O + 2 ,O − 2 ,O 2− 2 the number of species showing diamagnetism is 25 Jul 2022 (M) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 12 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q96. Number of lone pair (s) of electrons on central atom and the shape of BrF molecule respectively, are : 3 29 Jun 2022 (E) (1) 0 , triangular planar. (2) 1 , pyramidal. (3) 2 , bent T-shape. (4) 1 , bent T-shape Q97. Arrange the following in the decreasing order of their covalent character : (A) LiCl (B) NaCl (C) KCl (D) CsCl Choose the most appropriate answer from the options given below 29 Jun 2022 (M) (1) (A) > (C) > (B) > (D) (2) (B) > (A) > (C) > (D) (3) (A) > (B) > (C) > (D) (4) (A) > (B) > (D) > (C) Q98. Consider the species CH 4, NH + 4 and BH. Choose the correct option with respect to the there species: − 4 29 Jun 2022 (E) (1) They are isoelectronic and only two have tetrahedral structures (2) They are isoelectronic and all have tetrahedral structures (3) Only two are isoelectronic and all have tetrahedral structures (4) Only two are isoelectronic and only two have tetrahedral structures Q99. The hybridization of P exhibited in PF is sp 5 x d y. The value of y is 28 Jun 2022 (M) Q100. In the structure of SF , the lone pair of electrons on S is in. 4 28 Jun 2022 (E) (1) Equatorial position and there are two lone pair - bond pair repulsions at 90°. (2) equatorial position and there are three lone pair - bond pair repulsions at 90°. (3) axial position and there are three lone pair - bond pair repulsion at 90°. (4) axial position and there are two lone pair - bond pair repulsion at 90°. Q101. Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List - II and select the most appropriate option. List-I List-II (Shape) (Molecules) A T-shaped I. XeF 4 B Trigonal planar II. SF 4 C Square planar III. ClF 3 D See-saw IV. BF 3 27 Jun 2022 (M) (1) (A) − (I), (B) − (II), (C) − (III), (D) − (IV) (2) (A) − (III), (B) − (IV), (C) − (I), (D) − (II) (3) (A) − (III), (B) − (IV), (C) − (II), (D) − (I) (4) (A) − (IV), (B) − (III), (C) − (I), (D) − (II) Q102. Identify the incorrect statement for PCl from the following. 5 27 Jun 2022 (E) (1) In this molecule, orbitals of phosphorous are assumed to undergo sp 3 d hybridization. (2) The geometry of PCl is trigonal bipyramidal. 5 (3) PCl has two axial bonds stronger than three equatorial bonds. 5 (4) The three equatorial bonds of PCl lie in a plane. 5 For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 13 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q103. The correct order of increasing intermolecular hydrogen bond strength is 27 Jun 2022 (E) (1) HCN < H 2O < NH 3 (2) HCN < CH 4 < NH 3 (3) CH 4 < HCN < NH 3 (4) CH 4 < NH 3 < HCN Q104. Amongst SF 4, XeF 4 , CF 4 and H , the number of species with two lone pairs of electrons is 2O 26 Jun 2022 (E) Q105. The oxide which contains an odd electron at the nitrogen atom is 26 Jun 2022 (E) (1) N 2O (2) NO 2 (3) N 2 O3 (4) N 2 O5 Q106. Consider the ions/molecule O + 2 , O2 , O − 2 ,O 2− 2. For increasing bond order the correct option is 26 Jun 2022 (M) (1) O − 2 < O 2− 2 < O2 < O + 2 (2) O − 2 < O 2− 2 < O + 2 < O2 (3) O − 2 < O + 2 < O 2− 2 < O2 (4) O 2 2- < O2 - < O2 < O2 + Q107. Number of electron deficient molecules among the following PH 3, B 2 H 6 , CCl 4 , NH 3 , LiH and BCl is 3 25 Jun 2022 (M) (1) 0 (2) 1 (3) 2 (4) 3 Q108. How many of the following molecules are with non-zero net dipole moment, NH 3 , HCl, H 2 O , BeF 2 , BH 3 , CCl 4 25 Jun 2022 (E) Q109. Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron? (A) NO (B) N (C) O (D) C (E) B 2 2 2 2 Choose the most appropriate answer from the options given below : 25 Jun 2022 (M) (1) (A), (B), (C) only (2) (B), (C), (E) only (3) (A), (C) only (4) (D) only Q110. The correct order of bond orders of C 2− 2 , N 2− 2 and O 2− 2 is 24 Jun 2022 (E) (1) C 2− 2 > N 2− 2 > O 2− 2 (2) O 2− 2 > N 2− 2 > O 2− 2 (3) N 2− 2 > O 2− 2 > C 2− 2 (4) C 2− 2 > O 2− 2 > N 2− 2 Q111. The spin-only magnetic moment value of B species is ×10 + 2 −2 BM (Nearest integer) [Given : √3 = 1. 73] 01 Sep 2021 (E) Q112. Number of paramagnetic oxides among the following given oxides is ___________. Li 2 O, CaO, Na 2 O 2 , KO 2 , MgO and K 2O 01 Sep 2021 (E) (1) 1 (2) 3 (3) 0 (4) 2 Q113. According to molecular orbital theory, the number of unpaired electron(s) in O 2− 2 is _________. 31 Aug 2021 (E) For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 14 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q114. The number of species having non-pyramidal shape among the following is: (A) SO 3 (B) NO − 3 (C) PCl 3 (D) CO 2− 3 27 Aug 2021 (E) Q115. The compound/s which will show significant intermolecular H-bonding is/are : 27 Aug 2021 (E) (1) (a), (b) and (c) (2) (b) only (3) (c) only (4) (a) and (b) only Q116. The bond order and magnetic behaviour of O ion are, respectively : − 2 26 Aug 2021 (E) (1) 1. 5 and diamagnetic. (2) 1. 5 and paramagnetic. (3) 2 and diamagnetic. (4) 1 and paramagnetic Q117. AB is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is (Integer answer) 3 26 Aug 2021 (M) Q118. The interaction energy of London forces between two particles is proportional to r , where r is the distance x between the particles. The value of x is : 26 Aug 2021 (E) (1) 6 (2) −6 (3) 3 (4) −3 Q119. The difference between bond orders of CO and NO is ⊕ x 2 where x = (Round off to the Nearest Integer) 27 Jul 2021 (M) Q120. The total number of electrons in all bonding molecular orbitals of O 2− 2 is _____ (Round off to the nearest integer) 27 Jul 2021 (E) Q121. In gaseous triethyl amine the ′′−C − N − C −′′ bond angle is ____ degree. 27 Jul 2021 (M) Q122. Given below are two statements: One is labelled as Assertion A and the other labelled as Reason R. Assertion A : Lithium halides are some what covalent in nature. Reason R : Lithium possess high polarisation capability. In the light of the above statements, choose the most appropriate answer from the options given below: 27 Jul 2021 (M) (1) A is true but R is false (2) A is false but R is true (3) Both A and R are true but R is NOT the correct explanation of A (4) Both A and R are true and R is the correct explanation of A Q123. Identify the species having one π -bond and maximum number of canonical forms from the following : 25 Jul 2021 (E) (1) SO 3 (2) O 2 (3) SO 2 (4) CO 2− 3 For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 15 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q124. In the following the correct bond order sequence is: 25 Jul 2021 (E) (1) O 2− 2 > O + 2 > O − 2 > O2 (2) O + 2 > O − 2 > O 2− 2 > O2 (3) O + 2 > O2 > O − 2 > O 2− 2 (4) O 2 > O − 2 > O 2− 2 > O + 2 Q125. Match List-I with List-II List - I List - II (Elements) (Properties) (a) SF 4 (i) sp 3 d 2 (b) IF 5 (ii) d 2 sp 3 (c) NO + 2 (iii) sp 3 d (d) NH + 4 (iv) sp 3 (v) sp Choose the correct answer from the options given below: 22 Jul 2021 (M) (1) (a)-(i), (b)-( ii), (c)-(v) and (d)-(iii) (2) (a)-(ii), (b)-(i), (c)-(iv) and (d)-(v) (3) (a)-(iii), (b)-(i), (c)-(v) and (d)-(iv) (4) (a)-(iv), (b)-(iii), (c)-(ii) and (d)-(v) Q126. The hybridisations of the atomic orbitals of nitrogen in NO − 2 , NO + 2 and NH respectively are. + 4 20 Jul 2021 (E) (1) sp 3 , sp 2 and sp (2) sp, sp 2 and sp 3 (3) sp 3 , sp and sp 2 (4) sp 2 , sp and sp 3 Q127. The number of lone pairs of electrons on the central I atom in I is − 3 20 Jul 2021 (M) Q128. Which one of the following species doesn't have a magnetic moment of 1. 73 BM, (spin only value)? 20 Jul 2021 (E) (1) O + 2 (2) CuI (3) [Cu (NH 3 )4 ] Cl 2 (4) O − 2 Q129. The number of species below that have two lone pairs of electrons in their central atom is ___ (Round off to the Nearest integer) SF 4, BF − 4 , ClF 3 , AsF 3 , PCl 5 , BrF 5 , XeF 4 , SF 6 18 Mar 2021 (E) Q130. AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital theory, the bond order of AX is 2. 5. The total number of electrons in AX is_____. (Round off to the Nearest Integer). 18 Mar 2021 (M) Q131. Amongst the following, the linear species is: 17 Mar 2021 (E) (1) NO 2 (2) Cl 2 O (3) O 3 (4) N − 3 For solutions, download the MARKS App from Google Play or visit https://web.getmarks.app on Google Chrome 16 Chemical Bonding and Molecular Structure JEE Main 2024 - 2019 PYQs Chapter Priority: Priority A MathonGo Q132. A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is 17 Mar 2021 (M) (1) see-saw (2) planar triangular (3) T-shaped (4) trigonal pyramidal Q133. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The H − O − H bond angle in water molecule is 104. 5°. Reason R : The lone pair − lone pair repulsion of electrons is higher than the bond pair − bond pair repulsion. 16 Mar 2021 (M) (1) A is false but R is true (2) Both A and R are true, but R is not the correct explanation of A (3) A is true but R is false (4) Both A and R are true, and R is the correct explanation of A Q134. Statement I : Sodium hydride can be used as an oxidising agent. Statement II : The lone pair of electrons on nitrogen in pyridine makes it basic. Choose the CORRECT answer from the options given below : 16 Mar 2021 (E) (1) Both statement I and statement II are false (2) Statement I is true but statement II is false (3) Statement I is false but statement II is true (4) Both statement I and statement II are true Q135. Match List-I with List-II. List-I List-II (Molecule) (Bond order) (a) Ne 2 (i) 1 (b) N2 (ii) 2 (c) F2 (iii) 0 (d) O2 (iv)