Chemical Bonding Past Paper Questions PDF

CHEMICAL BONDING EXERCISE #5 (JEE MAIN) 1. The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statement is true for these two species? [AIEEE–2004]...

CHEMICAL BONDING EXERCISE #5 (JEE MAIN) 1. The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statement is true for these two species? [AIEEE–2004] + (A) Bond length in NO is equal to that NO (B) Bond length in NO is greater than NO+ (C) Bond length in NO+ is greater than NO (D) Bond length is unpredictable 2. The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively: [AIEEE 2004] 3 2 2 3 2 2 (A) sp and sp (B) sp and sp (C) sp and sp (D) sp and sp3 3 3. The maximum number of 90º angles between bond pair-bond pair of electrons is observed in: [AIEEE 2004] 2 3 3 3 2 (A) dsp hybridization (B) sp d hybridization (C) dsp hybridization (D) sp d hybridization 4. Which one of the following specie is diamagnetic in nature? [AIEEE-2005] – (A) He2+ (B) H2 (C) H2+ (D) H2 5. Which of the following molecule\ion does not contain unpaired electrons? [AIEEE-2006] + 2– (A) N2 (B) O2 (C) O2 (D) B2 6. Among the following mixtures, dipole-dipole as the major interaction, is present in: [AIEEE-2006] (A) KCl and water (B) benzene and carbon tetrachloride (C) benzene and ethanol (D) acetonitrile and acetone 7. A metal, M forms chlorides in its +2 and +4 oxidation states. Which of the following statement about these chlorides is correct? [AIEEE-2006] (A) MCl2 is more ionic than MCl4 (B) MCl2 is more easily hydrolysed than MCl4 (C) MCl2 is more volatile than MCl4 (D) MCl2 is more soluble in anhydrous ethanol than MCl4 8. The decreasing values of bond angles from NH3 (106º) to SbH3 (91º) down group-15 of the periodic table is due to: [AIEEE-2006] (A) decreasing lp – bp repulsion (B) increasing electronegativity (C) increasing bp – bp repulsion (D) increasing p-orbital character in sp3 9. In which of the following ionization process, the bond order has increased and the magnetic behaviour has changed: [AIEEE-2007] (A) NO → NO + (B) O2 → O2 + (C) N2 → N2 + (D) C2 → C2+ 10. Which of the following species exhibits the diamagnetic behaviour: [AIEEE-2007] (A) O2+ (B) O2 (C) NO (D) O2 2– 11. Which one of the following pairs of species have the same bond order? [AIEEE-2008] (A) CN– and NO+ (B) CN– and CN+ (C) O2– and CN– (D) NO+ and CN+ PHYSICS WALLAH 28  CHEMICAL BONDING 12. The bond dissociation energy of B–F in BF3 is 646 kJ mol–1 whereas that of C–F in CF4 is 515 kJ mol–1. The correct reason for higher B–F bond dissociation energy as compared to that of C–F is: [AIEEE-2009] (A) Significant p – p interaction between B and F in BF3 whereas there is not possibility of such interaction between C and F in CF4. (B) Lower degree of p – p interaction between B and F in BF3 than that between C and F in CF4 (C) Smaller size of B-atom as compared to that of C-atom (D) Stronger  bond between B and F in BF3 as compared to that between C and F in CF4 13. Using MO theory predict which of the following species has the shortest bond length? [AIEEE-2009] – 2– 2+ + (A) O2 (B) O2 (C) O2 (D) O2 14. Among the following the maximum covalent character is shown by the compound: [AIEEE-2011] (A) AlCl3 (B) MgCl2 (C) FeCl2 (D) SnCl2 15. Which one of the following molecules is expected to exhibit diamagnetic behaviour? [AIEEE-2013] (A) C2 (B) N2 (C) O2 (D) S2 16. In which of the following pairs of molecules/ions, both the species are not likely to exist? [JEE-M-2013] + 2– – 2– 2+ – (A) H2 , He2 (B) H2 , He2 (C) H2 , He (D) H2 , He22+ 17. Stability of the species Li2, Li2– and 2 Li2+ increases in the order of: [JEE-M-2013] + – – + – – (A) Li2 < Li2 < Li2 (B) Li2 < Li2 < Li2 (C) Li2 < Li2 < 2 Li2 (D) Li2 < Li2 < Li2+ + 18. Which one of the following properties is not shown by NO? [JEE-M-2014] (A) It combines with oxygen to form nitrogen dioxide (B) It's bond order is 2.5 (C) It is diamagnetic in gaseous state (D) It is a neutral oxide 19. The correct order of thermal stability of hydroxides is: [JEE-M-2015 (on line)] (A) Ba(OH)2 < Sr(OH)2 < Ca(OH)2 < Mg(OH)2 (B) Mg(OH)2 < Sr(OH)2 < Ca(OH)2 < Ba(OH)2 (C) Mg(OH)2 < Ca(OH)2 < Sr(OH)2 < Ba(OH)2 (D) Ba(OH)2 < Ca(OH)2 < Sr(OH)2 < Mg(OH)2 20. Which of the alkaline earth metal halides given below is essentially covalent in nature: [JEE-M-2015 (on line)] (A) SrCl2 (B) CaCl2 (C) BeCl2 (D) MgCl2 21. Which one of the following alkaline earth metal sulphates has its hydration enthalpy greater than its lattice enthalpy? [JEE-M-2015] (A) BaSO4 (B) SrSO4 (C) CaSO4 (D) BeSO4 PHYSICS WALLAH 29  CHEMICAL BONDING 22. The intermolecular interaction that is dependent on the inverse cube of distance between the molecules is: [JEE-M-2015] (A) London force (B) Hydrogen bond (C) ion-ion interaction (D) ion-dipole interaction 23. Which one has the highest boiling point? [JEE-M-2015] (A) Kr (B) Xe (C) He (D) Ne 24. Which intermolecular force is most responsible in allowing xenon gas to liquefy? [JEE (MAIN) ONLINE 2016] (A) Ionic (B) Instantaneous dipole- induced dipole (C) Dipole - dipole (D) Ion - dipole 25. The bond angle H–X–H is the greatest in the compound: [JEE (MAIN) ONLINE 2016] (A) NH3 (B) H2O (C) PH3 (D) CH4 26. Which of the following species is not paramagnetic? [JEE (MAIN) ONLINE 2017] (A) NO (B) CO (C) O2 (D) B2 27. Which of the following is paramagnetic? [JEE-MAIN-2017 (ONLINE)] (A) CO (B) O22– (C) NO+ (D) B2 28. sp3d2 hybridization is not displayed by: [JEE-MAIN-2017 (On-line)] (A) [CrF6]3– (B) BrF5 (C) PF5 (D) SF6 29. The number of S=O and S–OH bonds present in peroxodisulphuric acid and pyrosulphuric acid respectively are: [JEE-MAIN-2017 (On-line)] (A) (2 and 4) and (2 and 4) (B) (4 and 2) and (2 and 4) (C) (2 and 2) and (2 and 2) (D) (4 and 2) and (4 and 2) 30. The correct sequence of decreasing number of -bonds in the structures of H2SO3, H2SO4 and H2S2O7 is: [JEE-MAIN-2017 (On-line)] (A) H2S2O7 > H2SO4 > H2SO3 (B) H2SO3 > H2SO4 > H2S2O7 (C) H2S2O7 > H2SO3 > H2SO4 (D) H2SO4 > H2S2O7 > H2SO3 31. The increasing order of the boiling point for the following compounds is: [JEE-MAIN-2017 (On-line)] (I) C2H5OH (II) C2H5Cl (III) C2H5CH3 (IV) C2H5OCH3 (A) (III) < (II) < (I) < (IV) (B) (II) < (III) < (IV) < (I) (C) (IV) < (III) < (I) < (II) (D) (III) < (IV) < (II) < (I) 32. The number of P–OH bonds and the oxidation state of phosphorus atom in pyrophosphoric acid (H4P2O7) respectively are: [JEE-MAIN-2017 (On-line)] (A) five and four (B) five and five (C) four and five (D) four and four PHYSICS WALLAH 30  CHEMICAL BONDING 33. The group having triangular planar structures is: [JEE-MAIN-2017 (On-line)] (A) CO32–, NO3–, SO3 (B) NCl3, BCl3, SO3 (C) NH3, SO3, CO32– (D) BF3, NF3, CO32– 34. In the molecular orbital diagram for the molecular ion, N2+, the number of electrons in the 2p molecular orbitals: [JEE Main online - 2018] (A) 0 (B) 1 (C) 2 (D) 3 35. Which of following is a Lewis acid? [JEE Main online - 2018] (A) PH3 (B) B(CH3)3 (C) NaH (D) NF3 36. (I) (II) [JEE Main online - 2018] H—N---N---N In hydrogen azide (above) the bond orders of bonds (I) and (II) are: (I) (II) (A) 2 (B) >2 2 >2 (D) PF3 > BF3 (B) I3 > BF3 > NH3 > PF3 – (C) BF3 > I3 > PF3 > NH3 (D) BF3 > NH3 > PF3 > I3– 38. Xenon hexafluoride on partial hydrolysis produces compounds ‘X’ and ‘Y’. Compounds ’X’ and ‘Y’ and the oxidation state of Xe are respectively: [JEE Main online - 2018] (A) XeO2(+4) and XeO3(+6 (B) XeOF4(+6) AND XeO3(+6) (C) XeO2F2(+6) and XeO2(+4) (D) XeOF4(+6) and XeO2F2(+6) 39. Among the oxides of nitrogen: N2O3, N2O4 and N2O5; the molecule(s) having nitrogen-nitrogen bond is/are: [JEE Main online - 2018] (A) Only N2O5 (B) N2O3 and N2O5 (C) N2O5 and N2O5 (D) N2O3 and N2O4 40. Which of the following conversions involves change in both shape and hybridisation? [JEE Main online - 2018] (A) NH3 → NH4 + (B) CH4 → C2H6 (C) H2O → H3O + (D) BF3 → BF4– 41. A group 13 element ‘X’ reacts with chlorine gas to produce a compound XCl 3 is electron deficient and easily reacts with NH3 to form Cl3X  NH3 adduct; however, XCl3 does not dimerize. X is: [JEE Main online - 2018] (A) B (B) Al (C) Ga (D) In 42. Which of the following best describes the diagram below of a molecular orbital? [JEE Main online - 2018] (A) A non-bonding orbital (B) An antibonding  orbital (C) A bonding  orbital (D) An antibonding  orbital PHYSICS WALLAH 31  CHEMICAL BONDING 43. In KO2, the nature of oxygen species and the oxidation state of oxygen atom are, respectively: [JEE Main online - 2018] (A) Oxide an –2 (B) superoxide and –1/2 (C) Peroxide and –1/2 (D) Superoxide and –1 44. The number of P–O bonds in P4O6 is: [JEE Main online - 2018] (A) 6 (B) 9 (C) 12 (D) 18 45. In XeO3F2, the number of -bond(s), -bond(s) and lone pair(s) on Xe atom respectively are: [JEE Main online - 2018] (A) 5, 2, 0 (B) 4, 2, 2 (C) 5, 3, 0 (D) 4, 4, 0 46. Identify the pair in which the geometry of the species is T-shpes and square pyramidal, respectively: [JEE Main online - 2018] – – (A) CIF3 and IO4 (B) ICl2 and ICI5 (C) XeOF2 and XeOF4 (D) IO3– and IO2F2– 47. The incorrect geometry is represented by: [JEE Main online - 2018] (A) BF3 - trigonal planar (B) H2O - bent (C) NF3 - trigonal planar (D) AsF5 = trigonal bipyramidal 48. Correct statements among a to d regarding silicones are: [JEE Main online - 2019] (a) They are polymers with hydrophobic character (b) They are biocompatible. (c) In general, they have high thermal stability and low dielectric strength. (d) Usually, they are resistant to oxidation and used as greases. (A) (a), (b) and (c) only (B) (a), and (b) only (C) (a), (b), (c) and (d) (D) (a), (b) and (d) only 49. According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2–? [JEE Main online - 2019] (A) Both are unstable (B) Li2 is unstable and Li2– is stable + (C) Li2+ is stable and Li2– is unstable (D) Both are stable 50. The one that is extensively used as a piezoelectric material is: [JEE Main online - 2019] (A) Quartz (B) Amorphous silica (C) Mica (D) Tridymite 51. Aluminium is usually found in +3 oxidation state. In contrast, thallium exists in +1 and +3 oxidation states. This is due to: [JEE Main online - 2019] (A) lanthanoid contraction (B) lattice effect (C) diagonal relationship (D) inert pair effect 52. In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic? [JEE Main online - 2019] (A) O2 ⎯→ O22– (B) O2 ⎯→ O2+ (C) NO ⎯→ NO+ (D) N2 ⎯→ N2+ PHYSICS WALLAH 32  CHEMICAL BONDING 53. The type of hybridisation and number of lone pair(s) of electrons of Xe in XeOF4 respectively, are: [JEE Main online - 2019] 3 3 2 3 (A) sp d and 2 (B) sp d and 2 (C) sp d and 1 (D) sp3d2 and 1 54. Two pi and half sigma bonds are present in: [JEE Main online - 2019] (A) N2+ (B) N2 (C) O2 + (D) O2 55. The number of 2-centre-2-electron and 3-centre-2-electron bonds in B2H6, respectively, are: [JEE Main online - 2019] (A) 2 and 2 (B) 4 and 2 (C) 2 and 4 (D) 2 and 1 56. The chloride that cannot get hydrolysed is: [JEE Main online - 2019] (A) SiCl4 (B) CCl4 (C) PbCl4 (D) SnCl4 57. The relative stability of +1 oxidation state of group 13 elements follows the order: [JEE Main online - 2019] (A) Ga < Al < In < Tl (B) Al < Ga < In < Tl (C) Al < Ga < Tl < In (D) Tl < In < Ga < Al 58. The hydride that is NOT electron deficient is: [JEE Main online - 2019] (A) SiH4 (B) AlH3 (C) B2H6 (D) GaH3 The shape/structure of  XeF5  and XeO3 F2 , respectively, are: − 59. [JEE Main online - 2020] (A) Pentagonal planar and trigonal bipyramidal (B) Trigonal bipyramidal and pentagonal planar (C) Octahedral and square pyramidal (D) Trigonal bipyramidal and trigonal bipyramidal 60. If AB4 molecule is a polar molecule, a possible geometry of AB4 is: [JEE Main online - 2020] (A) Tetrahedral (B) See-saw (C) Rectangular planar (D) Square planar 61. The number of sp2 hybrid orbitals in a molecule of benzene is: [JEE Main online - 2020] (A) 24 (B) 12 (C) 6 (D) 18 62. If the magnetic moment of a dioxygen species is 1.73 B.M, it may be: [JEE Main online - 2020] (A) O−2 or O2+ (B) O2 ,O−2 or O +2 (C) O 2 or O +2 (D) O 2 or O −2 63. Arrange the following bonds according to their average bond energies in descending order: [JEE Main online - 2020] C–Cl, C–Br, C–F, C–I (A) C–Br > C–I > C–Cl > C–F (B) C–Cl > C–Br > C–I > C–F (C) C–I > C–Br > C–Cl > C–F (D) C–F > C–Cl > C–Br > C–I 64. The bond order and the magnetic characteristics of CN– are: [JEE Main online - 2020] 1 1 (A) 3, paramagnetic (B) 2 , paramagnetic (C) 3, diamagnetic (D) 2 , diamagnetic 2 2 PHYSICS WALLAH 33  CHEMICAL BONDING 65. The relative strength of interionic/intermolecular forces in decreasing order is: [JEE Main online - 2020] (A) dipole-dipole > ion-dipole > ion-ion (B) ion-dipole > dipole-dipole > ion-ion (C) ion-dipole > ion-ion > dipole-dipole (D) ion-ion > ion-dipole > dipole-dipole 66. The dipole of CCl4, CHCl3 and CH4 are in the order: [JEE Main online - 2020] (A) CCl4 < CH4 < CHCl3 (B) CH4 = CCl4 < CHCl3 (C) CH4 < CCl4 < CHCl3 (D) CHCl3 < CH4 = CCl4 67. The increasing order of boiling points of the following compounds is: [JEE Main online - 2020] (A) I < III < IV < II (B) I < IV< II < III (C) IV < I < II < III (D) III < I < II < IV 68. The compound that has the largest H–M–H bond angle (M = N, O, S, C) is: [JEE Main online - 2020] (A) H2O (B) NH3 (C) H2S (D) CH4 69. The potential energy curve for the H2 molecule as a function of internuclear distance is: [JEE Main online - 2020] (A) (B) (C) (D) 70. The reaction in which the hybridisation of the underlined atom is affected is: [JEE Main online - 2020] (A) H3PO2 ⎯⎯⎯⎯⎯⎯ Disproportionation → (B) H2SO4 + NaCl ⎯⎯⎯ 420K → + (C) NH3 ⎯⎯ H → (D) XeF4 + SbF5 ⎯⎯ → 71. If the boiling point of H2O is 373 K and the boiling point of H2S will be: [JEE Main online - 2020] (A) less than 300 K (B) equal to 373 K (C) more than 373 K (D) greater than 300 K but less than 373 K PHYSICS WALLAH 34  CHEMICAL BONDING 72. Of the species, NO, NO+, NO2+ and NO– the one with minimum bond strength is: [JEE Main online - 2020] (A) NO + (B) NO (C) NO 2+ (D) NO– 73. Match the type of interaction in column A with the distance dependence of their interaction energy in column B: [JEE Main online - 2020] A B 1 (i) ion-ion (a) r 1 (ii) Dipole-dipole (b) 2 r 1 (iii) London dispersion (c) 3 r 1 (d) 6 r (A) (i)-(b); (ii)-(d); (iii)-(c) (B) (i)-(a); (ii)-(b); (iii)-(d) (C) (i)-(a); (ii)-(b); (iii)-(c) (D) (i)-(a); (ii)-(c); (iii)-(d) 74. The molecular geometry of SF6 is octahedral. What is the geometry of SF4 (including lone pair(s) of electrons, if (any)? [JEE Main online - 2020] (A) Tetrahedral (B) Trigonal bipyramidal (C) Pyramidal (D) Square planar 75. Among the compounds A and B with molecular formula C9H18O3, A is having higher boiling point than B. The possible structures of A and B are: [JEE Main online - 2020] (A) (B) (C) (D) 76. The predominant intermolecular forces present in ethyl acetate, a liquid are: [JEE Main online - 2020] (A) London dispersion and dipole-dipole (B) Hydrogen bonding and London dispersion (C) Dipole-dipole and hydrogen bonding (D) London dispersion, dipole-dipole and hydrogen bonding PHYSICS WALLAH 35  CHEMICAL BONDING 77. The intermolecular potential energy for the molecules A, B, C and D given below suggests that: [JEE Main online - 2020] (A) A–D has the shortest bond length (B) A–A has the largest bond enthalpy (C) D is more electronegative than other atoms (D) A–B has the stiffest bond [JEE Main 2021-2022] 78. Match List I with List II: List-I List-II (Molecule) (Hybridization; Shape) A. XeO3 I. sp3d; linear B. XeF2 II. sp3; pyramidal C. XeOF4 III. sp3d3; distorted octahedral D. XeF6 IV. sp3d2; square pyramidal Choose the correct answer from the options given below: (A) A-II, B-I, C-IV, D-III (B) A-II, B-IV, C-III, D-I (C) A-IV, B-II, C-III, D-I (D) A-IV, B-II, C-I, D-III 79. The most stable trihalide of nitrogen is: (A) NF3 (B) NCl3 (C) NBr3 (D) NI3 80. 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) N2 (C) O2 (D) C2 (E) B2 Choose the most appropriate answer from the options given below: (A) (A), (B), (C) only (B) (B), (C), (E) only (C) (A), (C) only (D) (D) only 81. Number of electron deficient molecules among the following PH3, B2H6, CCl4, NH3, LiH and BCl3 is: (A) 0 (B) 1 (C) 2 (D) 3 82. Which one of the following alkaline earth metal ions has the highest ionic mobility in its aqueous solution? (A) Be2+ (B) Mg2+ (C) Ca2+ (D) Sr2+ 83. The oxide which contains an odd electron at the nitrogen atom is: (A) N2O (B) NO2 (C) N2O3 (D) N2O5 PHYSICS WALLAH 36  CHEMICAL BONDING 84. Consider the ions/molecule O+2 ,O2 ,O2− ,O22− For increasing bond order the correct option is: (A) O22−  O2−  O2  O2+ (B) O−2  O22−  O2  O2+ (C) O−2  O22−  O+2  O2 (D) O−2  O+2  O22−  O2 85. Identify the incorrect statement for PCl5 from the following: (A) In this molecule, orbitals of phosphorous are assumed to undergo sp3d hybridization. (B) The geometry of PCl5 is trigonal bipyramidal. (C) PCl5 has two axial bonds stronger than three equatorial bonds. (D) The three equatorial bonds of PCl5 lie in a plane. 86. The correct order of increasing intermolecular hydrogen bond strength is: (A) CN < H2O < NH3 (B) HCN < CH4 < NH3 (C) CH4 < HCN < NH3 (D) CH4 < NH3 < HCN 87. 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) XeF4 (B) Trigonal planar (II) SF4 (C) Square planar (III) ClF3 (D) See-saw (IV) BF3 (A) (A) – I, (B) – (II), (C) – (III), (D) – (IV) (B) (A) – (III), (B) – (IV), (C) – (I), (D) – (II) (C) (A) – (III), (B) – (IV), (C) – (II), (D) – (I) (D) (A) – (IV), (B) – (III), (C) – (I), (D) – (II) 88. In the structure of SF4, the lone pair of electrons on S is in: (A) equatorial position and there are two lone pair-bond pair repulsions at 90° (B) equatorial position and there are three lone pair-bond pair repulsions at 90° (C) axial position and there are three lone pair –bond pair repulsion at 90°. (D) axial position and there are two lone pair –bond pair repulsion at 90°. 89. Consider the species CH4, NH4+ and BH4–. Choose the correct option with respect to the there species: (A) They are isoelectronic and only two have tetrahedral structures (B) They are isoelectronic and all have tetrahedral structures (C) Only two are isoelectronic and all have tetrahedral structures (D) Only two are isoelectronic and only two have tetrahedral structures 90. Number of lone pair (s) of electrons on central atom and the shape of BrF3 molecule respectively, are: (A) 0, triangular planar (B) 1, pyramidal (C) 2, bent T-shape (D) 1, bent T-shape 91. 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: (A) (A) > (C) > (B) > (D) (B) (B) > (A) > (C) > (D) (C) (A) > (B) > (C) > (D) (D) (A) > (B) > (D) > (C) PHYSICS WALLAH 37  CHEMICAL BONDING 92. The geometry around boron in the product 'B' formed from the following reaction is: BF3 + NaH ⎯⎯⎯450K → A + NaF A + NMe3 → B (A) trigonal planar (B) tetrahedral (C) pyramidal (D) square planar 93. Match List - I with List - II: List-I List-II (Compound) (Shape) (A) BrF5 (I) bent (B) [CrF6]3– (II) square pyramidal (C) O3 (III) trigonal bipyramidal (D) PCl5 (IV) octahedral Choose the correct answer from the options given below: (A) (A) – (I), (B) - (II), (C) - (III), (D) - (IV) (B) (A) - (IV), (B) - (III), (C) - (II), (D) - (I) (C) (A) - (II), (B) - (IV), (C) - (I), (D) - (III) (D) (A) - (III), (B) - (IV), (C) - (II), (D) - (I) 94. Arrange the following in increasing order of their covalent character. (A) CaF2 (B) CaCl2 (C) CaBr2 (D) CaI2 Choose the correct answer from the options given below: (A) B < A < C < D (B) A < B < C < D (C) A < B < D < C (D) A < C < B < D 95. Match List-I with List-II: List-I List-II (A) MO = A − B (I) Dipole moment (B)  = Q  r (II) Bonding molecular orbital N b − Na (C) 2 (III) Anti-bonding molecular orbital (D) MO = A + B (IV) Bond order (A) (A)-(II), (B)-(I), (C)-(IV), (D)-(III) (B) (A)-(III), (B)-(IV), (C)-(I), (D)-(II) (C) (A)-(III), (B)-(I), (C)-(IV), (D)-(II) (D) (A)-(III), (B)-(IV), (C)-(II), (D)-(I) 96. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R) Assertion (A): Boron is unable to form BF63− Reason (R): Size of B is very small. In the light of the above statements, choose the correct answer from the options given below: (A) Both (A) and (R) are true and (R) is the correct explanation of (A) (B) Both (A) and (R) are true but (R) is not the correct explanation of (A) (C) (A) is true but (R) is false (D) (A) is false but (R) is true 97. 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 (A) Both A and R are true and R is the correct explanation of A (B) Both A and R are true but R is NOT the correct explanation of A (C) A is true but R is false (D) A is false but R is true PHYSICS WALLAH 38  CHEMICAL BONDING 98. Given below are two statements. Statement-I: Stannane is an example of a molecular hydride. Statement-II: Stannane is a planar molecule. In the light of the above statement, choose the most appropriate answer from the options given below: (A) Both Statement I and Statement II are true. (B) Both Statement I and Statement II are false. (C) Statement I is true but Statement II is false. (D) Statement I is false but Statement II is true. 99. Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule? (A) BCl3 and SF6 (B) NO and H2SO4 (C) SF6 and H2SO4 (D) BCl3 and NO 100. Number of lone pairs of electrons in the central atom of SCl2, O3, ClF3 and SF6, respectively, are: (A) 0, 1, 2 and 2 (B) 2, 1, 2 and 0 (C) 1, 2, 2 and 0 (D) 2, 1, 2 and 0 101. The correct order of bound orders of C22− , N22− and O22− is, respectively. (A) C22−  N22−  O22− (B) O22−  N22−  C22− (C) C22−  O22−  N22− (D) N22−  C22−  O22− 102. PCl5 is well known. but NCl5 is not. Because. (A) nitrogen is less reactive than phosphorous. (B) nitrogen doesn't have d-orbitals in its valence shell. (C) catenation tendency is weaker in nitrogen than phosphorous. (D) size of phosphorous is larger than nitrogen. 103. Given below are two statements. Statement-I: The presence of weaker π- bonds make alkenes less stable than alkanes. Statement-II: The strength of the double bond is greater than that of carbon-carbon single bond. In the light of the above statements, choose the correct answer from the options given below. (A) Both Statement I and Statement II are correct. (B) Both Statement I and Statement II are incorrect. (C) Statement I is correct but Statement II is incorrect. (D) Statement I is incorrect but Statement II is correct. 104. Which of the following are isostructural pairs? A. SO24− and CrO24− B. SiCl4 and TiCl4 C. NH3 and NO3− D. BCl3 and BrCl3 (A) C and D only (B) A and B only (C) A and C only (D) B and C only 105. The correct shape and I–I–I bond angles respectively in I 3− ion are: (A) Distorted trigonal planar; 135° and 90° (B) T-shaped; 180° and 90° (C) Trigonal planar; 120° (D) Linear; 180° 106. The correct set from the following in which both pairs are in correct order of melting point is: (A) LiF > LiCl; MgO > NaCl (B) LiCl > LiF; NaCl > MgO (C) LiF > LiCl; NaCl > MgO (D) LiCl > LiF; MgO > NaCl PHYSICS WALLAH 39  CHEMICAL BONDING 107. Which among the following species has unequal bond lengths? (A) BF4− (B) XeF4 (C) SF4 (D) SiF4 108. According to molecular theory, the species among the following that does not exist is: (A) He2+ (B) He2– (C) Be2 (D) O22– 109. The correct order of bond dissociation enthalpy of halogens is: (A) Cl2 > F2 > Br2 > I2 (B) I2 > Br2 > Cl2 > F2 (C) Cl2 > Br2 > F2 > I2 (D) F2 > Cl2 > Br2 > I2 110. Match List-I with List-II. List-I List-II (Molecule) (Bond order) (a) Ne2 (i) 1 (b) N2 (ii) 2 (c) F2 (iii) 0 (d) O2 (iv) 3 Choose the correct answer from the options given below: (A) (a) → (iii), (b) → (iv), (c) → (i), (d) → (ii) (B) (a) → (i), (b) → (ii), (c) → (iii), (d) → (iv) (C) (a) → (ii), (b) → (i), (c) → (iv), (d) → (iii) (D) (a) → (iv), (b) → (iii), (c) → (ii), (d) → (i) 111. Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R. Assertion A: Dipole-dipole interactions are the only non-covalent interactions, resulting in hydrogen bond formation. Reason R: Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical. In the light of the above statements, choose the most appropriate answer from the options given below. (A) A is false but R is true (B) Both A and R are true and R is the correct explanation of A (C) A is true R is false (D) Both A and R are true but R is NOT the correct explanation of A 112. Amongst the following, the linear species is: (A) NO2 (B) Cl2O (C) O3 (D) N3− 113. A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is: (A) see-saw (B) planar triangular (C) T-shaped (D) trigonal pyramidal 114. The hybridisations of the atomic orbitals of nitrogen in NO−2 , NO2+ and NH+4 respectively are: (A) sp3, sp2 and sp (B) sp, sp2 and sp3 (C) sp3, sp and sp2 (D) sp2, sp and sp3 115. The correct order of conductivity of ions in water is: (A) Na+  K+  Rb+  Cs+ (B) Cs+  Rb+  K+  Na+ (C) K+  Na+  Cs+  Rb+ (D) Rb+  Na+  K+  Li+ PHYSICS WALLAH 40  CHEMICAL BONDING 116. The oxidation states of nitrogen in NO,NO2 , N2O and NO3− are in the order of: (A) NO3−  NO2  NO  N2O (B) NO2  NO3−  NO  N2O (C) N2O  NO2  NO  NO3− (D) NO  NO2  N2O  NO3− 117. Match List-I with List-II: List-I List-II (Species) (Hybrid Orbitals) (a) SF4 (i) sp3d2 (b) IF5 (ii) d2sp3 (c) NO+2 (iii) sp3d (d) NH+4 (iv) sp3 (v) sp Choose the correct answer from the options given below: (A) (a)-(i), (b)-(ii), (c)-(v) and (d)-(iii) (B) (a)-(ii), (b)-(i), (c)-(iv) and (d)-(v) (C) (a)-(iii), (b)-(i), (c)-(v) and (d)-(iv) (D (a)-(iv), (b)-(iii), (c)-(ii) and (d)-(v) 118. In the following the correct bond order sequence is: (A) O22−  O+2  O−2  O2 (B) O+2  O−2  O22−  O2 (C) O+2  O2  O−2  O22− (D) O2  O2−  O22−  O2+ 119. Identify the species having one -bond and maximum number of canonical forms from the following: (A) SO3 (B) O2 (C) SO2 (D) CO32– 120. The interaction energy of London forces between two particles is proportional to r x, where r is the distance between the particles. The value of x is: (A) 3 (B) –3 (C) –6 (D) 6 121. The bond order and magnetic behaviour of O −2 ion are, respectively: (A) 1.5 and paramagnetic (B) 1.5 and diamagnetic (C) 2 and diamagnetic (D) 1 and paramagnetic 122. Assertion (A): Barium carbonate is insoluble in water and is highly stable. Reason (R): The thermal stability of the carbonates increases with increasing cationic size. (A) Both (A) and (R) are true but (R) is the true explanation of (A) (B) (A) is true but (R) is false (C) Both (A) and (R) are true and (R) is not the true explanation of (A) (D) (A) is false but (R) is true. PHYSICS WALLAH 41  CHEMICAL BONDING 123. Match List-I with List-II: List-I List-II (Species) (No. of lone pairs of electrons on the central atom) (A) XeF2 (i) 0 (B) XeO2F2 (ii) 1 (C) XeO3F2 (iii) 2 (D) XeF4 (iv) 3 Choose the most appropriate answer from the options given below: (A) (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i) (B) (a)-(iv), (b)-(i), (c)-(ii), (d)-(iii) (C) (a)-(iii), (b)-(ii), (c)-(iv), (d)-(i) (D) (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii) 124. The number of species having non-pyramidal shape among the following is (A) SO3 (B) NO3− (C) PCl3 (D) CO32− 125. Choose the correct stability order of group 13 elements in their +1 oxidation state. (A) Al < Ga < In < Tl (B) Tl < In < Ga < Al (C) Al < Ga < Tl < In (D) Al < Tl < Ga < In INTEGER TYPE QUESTION 126. Amongst SF4, XeF4, CF4 and H2O, the number of species with two lone pairs of electrons ______ 127. The sum of number of lone pairs of electrons present on the central atoms of XeO3, XeOF4 and XeF6 is __________. 128. Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is __________. 129. The number of molecule(s) or ion(s) from the following having non-planar structure is______. NO3− ,H2O2 ,BF3 ,PCl3 ,XeF4 SF4 ,XeO3 ,PH+4 ,SO3 , Al(OH)4  − 130. According to MO theory, number of species/ions from the following having identical bond order is_____: CN – , NO+ , O2 , O+2 , O22+ 131. Consider, PF5, BrF5, PCl3, SF6, [ICl4]–, ClF3 and IF5. Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having sp 3d2 hybridisation is____. 132. 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 25. The total number of electrons in AX is ______. (Round off to the Nearest Integer). 133. The total number of electrons in all bonding molecular orbitals of O22− is ________. (Round off to the nearest integer) PHYSICS WALLAH 42  CHEMICAL BONDING 134. PCl5  PCl3 + Cl3 Kc = 1.844 3.0 moles of PCl5 is introduced in a 1 L closed reaction vessel at 380 K. The number of moles of PCl 5 at equilibrium is _______ × 10–3. (Round off to the Nearest Integer) 135. AB3 is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is _______. 136. According to molecular orbital theory, the number of unpaired electron(s) in O22− is _____. 137. The spin-only magnetic moment value of B+2 species is ________× 10–2 BM. (Nearest integer) [Given: 3 = 1.73] 138. The hybridization of P exhibited in PF5 is spxdy. The value of y is __________. 139. The number of paramagnetic species among the following is ___________ B2 ,Li2 ,C2 ,C2− ,O22− ,O2+and He2+ 140. The ionization enthalpy of Na+ formation from Na (g) is 495.8 kJ mol–1, while the electron gain enthalpy of Br is –325.0 kJ mol–1. Given the lattice enthalpy of NaBr is –728.4 kJ mol–1. The energy for the formation of NaBr ionic solid is (–) ______ × 10–1 kJ mol–1. 141. The number of species below that have two lone pairs of electrons in their central atom is (Round off to the Nearest integer) SF4 , BF4− ,CIF3 , AsF3 , PCl5 , BrF5 , XeF4 ,SF6 142. Among the following species N2 , N2+ , N2− , N22− ,O2 ,O2+ ,O2− ,O22− the number of species showing diamagnetism is: 143. The number of lone pairs of electrons on the central I atom in I 3− is _________. [JEE Main-2023] 144. Order of Covalent bond; A. KF  KI;LiF  KF B. KF  KI;LiF  KF C. SnCl4  SnCl2 ;CuCl  NaCl D. LiF  KF;CuCl  NaCl E. KF  KI;CuCl  NaCl Choose the correct answer from the options given below: (A) C, E only (B) B, C only (C) A, B only (D) B, C, E only 145. The correct order of hydration enthalpies is: (A) K + (B) Rb+ (C) Mg2+ (D) Cs + (E) Ca 2+ Choose the correct answer from the options given below: (A) C  E  A  D  B (B) C  E  A  B  D (C) C  A  E  B  D (D) E  C  A  B  D PHYSICS WALLAH 43  CHEMICAL BONDING 146. The bond dissociation energy is higher for: (A) Br2 (B) F2 (C) Cl2 (D) I2 147. The number of molecules or ions from the following, which do not have odd number of electrons are_______ (A) NO2 (B) ICl −4 (C) BrF3 (D) ClO2 (E) NO+2 (F) NO 148. For OF2 molecule consider the following- 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: (A) A, B, D only (B) B, E, A only (C) A, C, D only (D) C, D, E only 149. Match List-I with List-II List-I List-II A XeF4 I See saw B SF4 II Square planar + C NH4 III Bent T-shaped D BrF3 IV Tetrahedral Choose the correct answer from the options given below: (A) A-II, B-I, C-III, D-IV (B) A-IV, B-I, C-II, D-III (C) A-IV, B-III, C-II, D-I (D) A-II, B-I, C-IV, D-III 150. The correct order of basicity of oxides of vanadium is: (A) V2O4  V2O3  V2O5 (B) V2O5  V2O4  V2O3 (C) V2O3  V2O4  V2O5 (D) V2O3  V2O5  V2O4 151. The oxidation state of phosphorus in hypophosphoric acid is +________ 152. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Cu 2+ in water is more stable than Cu + Reason (R): Enthalpy of hydration for Cu 2+ is much less than that of Cu +. In the light of the above statements, choose the correct answer from the options given below: (A) (A) is correct but (R) is not correct (B) Both (A) and (R) are correct and (R) is the correct explanation of (A) (C) (A) is not correct but (R) is correct (D) Both (A) and (R) are correct but (R) is not the correct explanation of (A) 153. The correct order of bond enthalpy (kJ mol–1) is: (A) C − C  Si − Si  Sn − Sn  Ge − Ge (B) Si − Si  C − C  Sn − Sn  Ge − Ge (C) C − C  Si − Si  Ge − Ge  Sn − Sn (D) Si − Si  C − C  Ge − Ge  Sn − Sn PHYSICS WALLAH 44  CHEMICAL BONDING 154. O − O bond length in H2 O2 is X than the O − O bond length in F2O2. The O − H bond length in H2 O2 is Y than that of the O − F bond in F2O2. Choose the correct option for X and Y from those given below: (A) X - longer, Y - longer (B) X - shorter, Y - shorter (C) X -longer, Y -shorter (D) X - shorter, Y -longer 155. What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species: N2; N2+; O2; O2+ ? (A) 0, 1, 2, 1 (B) 0, 1, 0, 1 (C) 2, 1, 0, 1 (D) 2, 1, 2, 1 156. Sum of π-bonds present in peroxodisulphuric acid and pyrosulphuric acid is: 157. The total number of lone pairs of electrons on oxygen atoms of ozone is _______. 158. According to MO theory the bond orders for O22− ,CO and NO+ respectively, are: (A) 2, 3 and 3 (B) 1, 3 and 3 (C) 1,2 and 3 (D) 1, 3 and 2 159. Total number of acidic oxides among N2O3 , NO2 , N2O,Cl2O7 ,SO2 ,CO,CaO, Na 2O and NO is: 160. Boric acid is solid, whereas BF3 is gas at room temperature because of: (A) Strong covalent bond in BF3 (B) Strong ionic bond in Boric acid (C) Strong van der Waal's interaction in Boric acid (D) Strong hydrogen bond in Boric acid 161. The Lewis acid character of boron tri halides follows the order: (A) BI3  BBr3  BCl3  BF3 (B) BBr3  BI3  BCl3  BF3 (C) BCl3  BF3  BBr3  BI3 (D) BF3  BCl3  BBr3  BI3 162. Amongst the following, the number of species having the linear shape is: XeF2 ,I3+ ,C3O2 ,I3− ,CO2 ,SO2 ,BeCl2 and BCl2 [JEE Main-2024] 163. Arrange the bonds in order of increasing ionic character in the molecules. LiF, K2O, N2, SO2 and ClF3: (A) ClF3 < N2 < SO2 < K2O < LiF (B) N2 < SO2 < ClF3 < K2O < LiF (C) LiF < K2O < ClF3 < SO2 < N2 (D) N2 < ClF3 < SO2 < K2O < LiF 164. 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 the light of the above statements, choose the most appropriate answer from the options given below: (A) Both Statement I and Statement II are true (B) Both Statement I and Statement II are false (C) Statement I is false but Statement II is true (D) Statement I is true but Statement II is false PHYSICS WALLAH 45  CHEMICAL BONDING 165. Select the compound from the following that will show intramolecular hydrogen bonding: (A) NH3 (B) H2O (C) C2H5OH (D) 166. Sum of bond order of CO and NO+ is ________. 167. The number of non–polar molecules from the following is _______. HF, H2O, SO2, H2, CO2, CH4, NH3, HCl, CHCl3, BF3 168. The number of species from the following which are paramagnetic and with bond order equal to one is _______. H2 ,H2+ ,O2 + N22– ,O22– ,F2 , Ne2+ ,B2 169. Number of compounds with one lone pair of electrons on central atom amongst following is _______. O3, H2O, SF4, ClF3, NH, BrF5, XeF4 170. The total number of anti-bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecule is: 171. Match List-I with List-II. List-I List - II Molecule Shape (i) BrF5 (I) T-shape (ii) H2O (II) See saw (iii) ClF3 (III) Bent (iv) SF4 (IV) Square pyramidal Choose the correct answer from the options given below: (A) (i)-(IV), (ii)-(III), (iii)-(I), (iv)-(II) (B) (i)-(I), (ii)-(II), (iii)-(IV), (iv)-(III) (C) (i)-(II), (ii)-(I), (iii)-(III), (iv)-(IV) (D) (i)-(III), (ii)-(IV), (iii)-(I), (iv)-(II) 172. The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is _______. 173. Given below are two statements: Statement-I: Since Fluorine is more electronegative than nitrogen, the net dipole moment of NF3 is greater than NH3. Statement-II: In NH3, the orbital dipole due to lone pair and the dipole moment of NH bonds are in opposite direction, but in NF3 the orbital dipole due to lone pair and dipole moments of N-F bonds are in same direction. In the light of the above statements, choose the most appropriate from the options given below: (A) Statement I is true but Statement II is false. (B) Both Statement I and Statement II are true. (C) Statement I is false but Statement II is true. (D) Both Statement I and Statement II are false. 174. The molecule / ion with square pyramidal shape is: (A)  Ni(CN)4 2− (B) PCl5 (C) PF5 (D) BrF5 PHYSICS WALLAH 46  CHEMICAL BONDING 175. The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals i. have the same energy ii. have the minimum overlap iii. have same symmetry about the molecular axis iv. have different symmetry about the molecular axis Choose the most appropriate from the options given below: (A) ii and iv only (B) i and iii only (C) ii, iii, iv only (D) i, ii, iii only 176. The number of species from the following in which the central atom uses sp3 hybrid orbitals in its bonding is ______. NH3, SO2, SiO2, BeCl2, CO2, H2O, CH4, BF3 177. Which of the following is least ionic? (A) AgCl (B) BaCl2 (C) KCl (D) CoCl2 178. A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is 1 A°, then fractional charge on each atom is _____ 10−1 esu. (Given 1 D = 10–18 esucm) PHYSICS WALLAH 47  CHEMICAL BONDING EXERCISE #6 (JEE ADVANCED) 1. The molecules that will have dipole moment are: [IIT–1992] (A) 2, 2–dimethylpropane (B) trans-pent-2-ene (C) cis-hex-3-ene (D) 2, 2, 3, 3–tetramethylbutane 2. Which of the following have identical bond order? [IIT–1992] + + (A) CN¯ (B) O2¯ (C) NO (D) CN 3. Among the following the one that is polar and has the central atom with sp2 hybridisation is: (A) H2CO3 (B) SiF4 (C) BF3 (D) HClO2 [IIT–1997] 4. Which of the following is soluble in water? [IIT–98] (A) CS2 (B) C2H5OH (C) CCl4 (D) CHCl3 5. The correct order of hybridization of the central atom in the following species NH3, [PtCl4]2–, PCl5 and BCl3 is: [IIT–2001] (A) dsp2, sp3d, sp2 and sp3 (B) sp3, dsp2, sp3d, sp2 (C) dsp2, sp2, sp3, sp3d (D) dsp2, sp3, sp2, sp3d 6. The common features among the species CN–, CO and NO+ are: [IIT–2001] (A) bond order three and isoelectronic (B) bond order three and weak field ligands (C) bond order two and -acceptors (D) isoelectronic and weak field ligands 7. Which of the following molecular specie has unpaired electron(s)? [JEE–2002] – 2– (A) N2 (B) F2 (C) O2 (D) O2 8. According to molecular orbital theory which of the following statement about the magnetic character and bond order is correct regarding O2+ : [JEE–2004] (A) Paramagnetic and Bond order < O2 (B) Paramagnetic and Bond order > O2 (C) Diamagnetic and Bond order < O2 (D) Diamagnetic and Bond order > O2 9. Among the following, the paramagnetic compound is: [JEE–2007] (A) Na2O2 (B) O3 (C) N2O (D) KO2 10. The species having bond order different from that in CO is: [JEE–2007] – + – (A) NO (B) NO (C) CN (D) N2 11. Statement-1: In water, orthoboric acid behaves as a weak monobasic acid. [JEE–2007] Statement-2: In water, orthoboric, acid acts as a proton donor. (A) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1. (B) Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1. (C) Statement-1 is True, Statement-2 is False. (D) Statement-1 is False, Statement-2 is True. PHYSICS WALLAH 48  CHEMICAL BONDING 12. Statement-1: Pb+4 compounds are stronger oxidizing agents than Sn4+ compounds Statement-2: The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to 'inert pair effect'. [JEE–2008] (A) Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1. (B) Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1. (C) Statement-1 is True, Statement-2 is False. (D) Statement-1 is False, Statement-2 is True. 13. Match each of the diatomic molecules/ions in Column I with its property/properties in Column II. [JEE–2009] Column I Column II (A) B2 (P) Paramagnetic (B) N2 (Q) undergoes oxidation – (C) O2 (R) Undergoes reduction (D) O2 (S) Bond order  2 (T) Mixing of 's' and `p' orbitals 14. In the reaction, [JEE–2009] 2X + B2H6 ⎯→ [BH2(X)2]+ [BH4]– the amine(s) X is (are): (A) NH3 (B) CH3NH2 (C) (CH3)2NH (D) (CH3)3N 15. The species having pyramidal shape is: [JEE–2010] 2– (A) SO3 (B) BrF3 (C) SiO3 (D) OSF2 16. Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule B2 is: [JEE–2010] (A) 1 and diamagnetic (B) 0 and diamagnetic (C) 1 and paramagnetic (D) 0 and paramagnetic 17. The value of n in the molecular formula BenAl2Si6O18 is: [JEE–2010] 18. The total number of diprotic acids among the following is: [JEE–2010] H3PO4 H2SO4 H3PO3 H2CO3 H2S2O7 H3BO3 H3PO2 H2CrO4 H2SO3 19. Among the following, the number of elements showing only one non-zero oxidation state is: O, Cl, F, N, P, Sn, Tl, Na, Ti [JEE–2010] 20. The difference in the oxidation numbers of the two types of sulphur atoms in Na2S4O6 is: [JEE-2011] 21. In allene (C3H4), the type(s) of hybridisation of the carbon atoms is(are): [JEE Adv. 2012] (A) sp and sp3 (B) sp and sp2 (C) only sp2 (D) sp and sp3 2 22. The shape of XeO2F2 molecule is: [JEE Adv. 2012] (A) trigonal bipyramidal (B) square planar (C) tetrahedral (D) see-saw PHYSICS WALLAH 49  CHEMICAL BONDING 23. With respect to graphite and diamond, which of the statement(s) given below is (are) correct? [JEE Adv. 2012] (A) Graphite is harder than diamond (B) Graphite has higher electrical conductivity than diamond. (C) Graphite has higher thermal conductivity than diamond. (D) Graphite has higher C–C bond order than diamond. 24. Hydrogen bonding plays a central role in the following phenomena: [JEE Adv. 2014] (A) Ice floats in water. (B) Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions (C) Formic acid is more acidic than acetic acid. (D) Dimerisation of acetic acid in benzene. 25. Assuming 2s-2p mixing is NOT operative, the paramagnetic species among the following is: [JEE Adv. 2014] (A) Be2 (B) B2 (C) C2 (D) N2 26. Match the orbital overlap figures shown in List-I with the description given in List-II and select the correct answer using the code given below the lists. [JEE Adv. 2014] List-I List-II (P) (1) p – d  antibonding (Q) (2) d – d  bonding (R) (3) p – d  bonding (S) (4) d – d  antibonding Code: P Q R S (A) 2 1 3 4 (B) 4 3 1 2 (C) 2 3 1 4 (D) 4 1 3 2 27. The correct statement(s) regarding, (i) HClO, (ii) HClO2, (iii) HClO3 and (iv) HCllO4 is (are): [JEE Adv. 2015] (A) The number of Cl = O bonds in (ii) and (iii) together is two (B) The number of lone pairs of electrons on Cl in (ii) and (iii) together is three (C) The hybridisation of Cl in (iv) is sp3 (D) Amongst (i) to (iv), the strongest acid is (i) PHYSICS WALLAH 50  CHEMICAL BONDING 28. Among the triatomic molecules/ions, BeCl2, N3− , N2O, NO+2 , O3, SCl2, ICl −2 , I 3− and XeF2 the total number of linear molecules(s)/ion(s) where the hybridization of the central atom does not have contribution form the d-orbital(s) is: [JEE Adv. 2015] [Atomic number: S = 16, Cl = 17, I = 53 and Xe = 54] 29. The total number of lone pairs of electrons in N2O3 is: [JEE Adv. 2015] 30. According to Molecular Orbital Theory, [JEE Adv. 2016] (A) C22– is expected to be diamagnetic (B) O22+ is expected to have a longer bond length than O2 (C) N2+ and N2– have the same bond order (D) He2+ has the same energy as two isolated He atoms 31. The order of the oxidation state of the phosphorus atom in H3PO2, H3PO4, H3PO3, and H4P2O6 is: [JEE Adv. 2017] (A) H3PO4 > H3PO2 > H3PO3 > H4P2O6 (B) H3PO3 > H3PO2 > H3PO4 > H4P2O6 (C) H3PO4 > H4P2O6 > H3PO3 > H3PO2 (D) H3PO2 > H3PO3 > H4P2O6 > H3PO4 32. The correct statement(s) about the oxoacid, HClO4 and HClO is(are): [JEE Adv. 2017] (A) HClO4 is more acidic than HClO because of the resonance stabilization of its anion (B) HClO4 is formed in the reaction between Cl2 and H2O (C) The central atom in both HClO4 and HClO is sp3 hybridized (D) The conjugate base of HClO4 is weaker base than H2O 33. The colour of the X2 molecules of group 17 elements changes gradually from yellow to violet down the group. The is due to [JEE Adv. 2017] (A) the physical state of X2 at room temperature changes from gas to solid down the group (B) Decrease in HOMO-LUMO gap down the group (C) decrease in *-* gap down the group (D) decrease in ionization energy down the group 34. Among H2, He2+, Li2, Be2, B2, C2, N2, O2–, and F2 the number of diamagnetic species is: (Atomic number H = 1, He = 2, Li = 3, Be = 4, B = 5, C = 6, N = 7, O = 8, F = 9) [JEE Adv. 2017] 35. The sum of the number of lone pairs of electrons on each central atom in the following species is: [TeBr6]2–, [BrF2]+ , SNF3 and [XeF3]– (Atomic number: N = 7, F = 9, S = 16, Br = 35, Te = 52, Xe = 54) [JEE Adv. 2017] 36. Based on the compounds of group 15 elements, the correct statement(s) is (are): [JEE Adv. 2018] (A) Bi2O5 is more basic than N2O5 (B) NF3 is more covalent than BiF3 (C) PH3 boils at lower temperature than NH3 (D) The N-N single bond is stronger that the P-P single bond PHYSICS WALLAH 51  CHEMICAL BONDING 37. The total number of compounds having at least one bridging oxo group among the molecules given below is _____. N2O3, N2O5, P4O6, P4O7, H4P2O5, H5P3O10, H2S2O3, H2P2O5 [JEE Adv. 2018] 38. The compound(s) which generate(s) N2 gas upon thermal decomposition below 300ºC is (are): [JEE Adv. 2018] (A) NH4NO3 (B) (NH4)2Cr2O7 (C) Ba(N3)2 (D) Mg3N2 39. Each of the following options contains a set of four molecules. Identify the option(s) where all four molecules possess permanent dipole moment at room temperature. [JEE Adv. 2019] (A) NO2, NH3, POCl3, CH3Cl (B) BeCl2, CO2, BCI3, CHCI3 (C) SO2, C6H5Cl, H2Se, BrF5 (D) BF3, O3, SF6, XeF6 40. Among B2H6, B3N3H6, N2O, N2O4, H2S2O3 and H2S2O8, the total number of molecules containing covalent bond between two atoms of the same kind is: [JEE Adv. 2019] 41. The correct molecular orbital diagram for molecule in the ground state is: [JEE Adv. 2023] (A) (B) (C) (D) PHYSICS WALLAH 52  CHEMICAL BONDING EXERCISE #4 1. (D) 2. (A) 3. (B) 4. (D) 5. (A) 6. (B) 7. (D) 8. (B) 9. (C, D) 10. (A, B) 11. (A, D) 12. (A, D) 13. (B) 14. (B) 15. (B) 16. (B) 17. (A) 18. (C) 19. (A)-P,R,S,T; (B)-P,Q,R,S;T; (C)-P,R,S,T; (D)-P,R,S,T 20. (A)-P,S,T; (B)-Q,R,S; (C)-P,R,S; (D)-Q EXERCISE #5 (JEE MAIN) 1. (B) 2. (C) 3. (D) 4. (B) 5. (C) 6. (D) 7. (A) 8. (D) 9. (A) 10. (D) 11. (A) 12. (A) 13. (C) 14. (A) 15. (B) 16. (C) 17. (B) 18. (C) 19. (C) 20. (C) 21. (D) 22. (B, D) 23. (B) 24. (B) 25. (D) 26. (B) 27. (D) 28. (A, C) 29. (D) 30. (A) 31. (D) 32. (C) 33. (A) 34. (B) 35. (B) 36. (A) 37. (B) 38. (D) 39. (D) 40. (D) 41. (A) 42. (D) 43. (B) 44. (C) 45. (C) 46. (C) 47. (C) 48. (C) 49. (D) 50. (A) 51. (D) 52. (C) 53. (D) 54. (A) 55. (B) 56. (B) 57. (B) 58. (A) 59. (A) 60. (B) 61. (D) 62. (A) 63. (D) 64. (C) 65. (D) 66. (B) 67. (B) 68. (D) 69. (B) 70. (D) 71. (A) 72. (D) 73. (D) 74. (B) 75. (A) 76. (A) 77. (D) 78. (A) 79. (A) 80. (C) 81. (C) 82. (D) 83. (B) 84. (A) 85. (C) 86. (C) 87. (B) 88. (A) 89. (B) 90. (C) 91. (C) 92. (B) 93. (C) 94. (B) 95. (C) 96. (B) 97. (A) 98. (C) 99. (B) 100. (B) 101. (B) 102. (B) 103. (A) 104. (B) 105. (D) 106. (A) 107. (C) 108. (C) 109. (C) 110. (A) 111. (A) 112. (D) 113. (C) 114. (D) 115. (B) 116. (A) 117. (C) 118. (C) 119. (D) 120. (C) 121. (A) 122. (A) 123. (D) 124. (C) 125. (A) 126. (2 or 1) 127. (3) 128. (3) 129. (6) 130. (3) 131. (4) 132. (15) 133. (10) 134. (1396) 135. (2) 136. (0) 137. (173) 138. (1) 139. (4) 140. (5576) 141. (2) 142. (2) 143. (3) 144. (D) 145. (B) 146. (C) 147. (3) 148. (A) 149. (D) 150. (C) 151. (4) 152. (B) 153. (C) 154. (C) 155. (A) 156. (8) PHYSICS WALLAH 54  CHEMICAL BONDING 157. (6) 158. (B) 159. (4) 160. (D) 161. (A) 162. (5) 163. (B) 164. (C) 165. (D) 166. (6) 167. (4) 168. (1) 169. (4) 170. (4) 171. (A) 172. (8) 173. (D) 174. (D) 175. (B) 176. (4) 177. (A) 178. (0) EXERCISE #6 (JEE ADVANCED) 1. (BC) 2. (AC) 3. (A) 4. (B) 5. (B) 6. (A) 7. (C) 8. (B) 9. (D) 10. (A) 11. (C) 12. (C) 13. (A)-P,Q,R,T (B)-Q,R,S,T (C)-P,Q,R (D)-P,Q,R,S 14. (BC) 15. (D) 16. (A) 17. (3) 18. (6) 19. (2) 20. (5) 21. (B) 22. (D) 23. (BD) 24. (ABD) 25. (C) 26. (C) 27. (BC) 28. (4) 29. (8) 30. (AC) 31. (C) 32. (ACD) 33. (BC) 34. (6) 35. (6) 36. (ABC) 37. (6) 38. (BC) 39. (AC) 40. (4.00) 41. (C) PW Web/App - https://smart.link/7wwosivoicgd4 Library- https://smart.link/sdfez8ejd80if PHYSICS WALLAH 55