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Chemical Bonding and Molecular Structure — JEE Main & Advanced Chemistry PYQs

635 previous year questions from Chemical Bonding and Molecular Structure with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

635 questionsChemistrySolutions on every page
1

The correct order of dipole moments for the given species is

JEE Advanced 2026 Solution View → 2

Consider the following species: SOCl ₂ , XeOF ₄ , ClF ₃ , ClF ₅ , XeF ₅^+ , SO ₃²⁻ , XeF ₃^+ , SF ₄ List-I contains different molecular shapes and List-II contains total number of

JEE Advanced 2026 Solution View → 3

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

JEE Advanced 2026 Solution View → 4

Bromine trifluoride autoionizes to form BrF ₂^ and BrF ₄^ . The shapes of the cation and anion are respectively ________, and ________.

JEE Main 2026 Solution View → 5

Given below are two statements : Statement I : The number of compounds among SO₂ , SO₃ , SF₄ , SF₆ and H₂ S in which sulphur does not obey the Octet rule is 3 . Statement II : Amon

JEE Main 2026 Solution View → 6

Given below are two statements : Statement I : F ₂ O Statement II : SiF ₄ , SnF ₄ and PbF ₄ are ionic in nature. In the light of the above statements, choose the correct answer fro

JEE Main 2026 Solution View → 7

The pairs among A = [ SO ₃²⁻, CO ₃²⁻] , B = [ O ₂²⁻, F ₂] , C = [ CN ^-, CO ] , D = [ NH ₃, H ₃ O ^+] and E = [ MnO ₄²⁻, CrO ₄²⁻] that do not have similar Lewis dot structure are

JEE Main 2026 Solution View → 8

The covalent radii of atoms A and B are r_A and r_B , respectively. The covalent bond length and total length of AB molecule are respectively

JEE Main 2026 Solution View → 9

Consider the following species: BrF₅ , XeF₅^- , BF₄^- , ICl₄^- , XeF₄ , SF₄ , NH₄^+ , ClF₃ , XeF₂ , ICl₂^- Number of species having sp ^3 d hybridized central atom is __________.

JEE Main 2026 Solution View → 10

Which of the following pictorial diagram most correctly represents the ^* ( -antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direc

JEE Main 2026 Solution View → 11

According to Lewis theory, the total number of bond-pairs and lone pair of electrons around the central atom of XeO₆⁴⁻ ion is _____.

JEE Main 2026 Solution View → 12

SF₄ is isostructural with: A. BrF₄^ B. CH₄ C. IF₄^ D. XeF₄ E. XeO₂ F₂ Choose the correct answer from the options given below:

JEE Main 2026 Solution View → 13

Given below are two statements : Statement (I) : The correct sequence of bond lengths in the following species is : O₂^+ Statement (II) : The correct sequence of number of unpaired

JEE Main 2026 Solution View → 14

Match List - I with List - II according to shape. ( array llll & List-I & & List-II A. & XeO₃ & I. & BrF₅ B. & XeF₂ & II. & NH₃ C. & XeO₂F₂ & III. & [ I₃ ]^- D. & XeOF₄ & IV. & SF₄

JEE Main 2026 Solution View → 15

Given below are two statements: Statement I : The number of species among BF ₄ ⁻, SiF ₄, XeF ₄ and SF ₄ , that have unequal E - F bond lengths is two. Here, E is the central atom.

JEE Main 2026 Solution View → 16

Pair of species among the following having same bond order as well as paramagnetic character will be-

JEE Main 2026 Solution View → 17

Among the following, the CORRECT combinations are A. IF ₃ ~T -shaped (sp . ³ ~d ) B. IF ₅ Square pyramidal ( sp ³ ~d ² ) C. IF ₇ Pentagonal bipyramidal ( sp ³ ~d ³ ) D. ClO ₄ ⁻ Squ

JEE Main 2026 Solution View → 18

Given below are statements about some molecules/ions. Identify the CORRECT statements. A. The dipole moment value of NF ₃ is higher than that of NH ₃ . B. The dipole moment value o

JEE Main 2026 Solution View → 19

Which statements are NOT TRUE about XeO ₂ ~F ₂ ? A. It has a see-saw shape. B. Xe has 5 electron pairs in its valence shell in XeO ₂ ~F ₂ . C. The O - Xe - O bond angle is close to

JEE Main 2026 Solution View → 20

Identify the molecule (X) with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among HNO ₃, H ₂ SO ₄, NF ₃ and O ₃ . Choose the correct bond angle ma

JEE Main 2026 Solution View → 21

Among H ₂ ~S , H ₂ O , NF ₃, NH ₃ and CHCl ₃ , identify the molecule ( X ) with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the

JEE Main 2026 Solution View → 22

Two p-block elements X and Y form fluorides of the type EF ₃ . The fluoride compound XF ₃ is a Lewis acid and YF ₃ is a Lewis base. The hybridizations of the central atoms of XF ₃

JEE Main 2026 Solution View → 23

The formal charges on the atoms marked as (1) to (4) in the Lewis representation of HNO ₃ molecule respectively are

JEE Main 2026 Solution View → 24

Given below are two statements: Statement I : The correct order in terms of bond dissociation enthalpy is Cl ₂> Br ₂> F ₂> I ₂ . Statement II : The correct trend in the covalent ch

JEE Main 2026 Solution View → 25

The correct increasing order of C-H(A), C-O(B), C=O(C) and C N(D) bonds in terms of covalent bond length is:

JEE Main 2026 Solution View → 26

Given below are two statements : Statement I : The number of species among SF ₄, NH ₄⁺, [ NiCl ₄ ]²⁻, XeF ₄, [ PtCl ₄ ]²⁻, SeF ₄ and [ Ni ( CN )₄ ]²⁻ , that have tetrahedral geomet

JEE Main 2026 Solution View → 27

Regarding the molecular orbital (MO) energy levels for homonuclear diatomic molecules, the INCORRECT statement(s) is(are)

JEE Advanced 2025 Solution View → 28

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

JEE Advanced 2025 Solution View → 29

In SO ₂, NO ₂⁻ and N ₃⁻ the hybridizations at the central atom are respectively :

JEE Main 2025 Solution View → 30

Match the List-I with List-II . Choose the correct answer from the options given below :

JEE Main 2025 Solution View → 31

Given below are two statements: Statement (I) : for ClF ₃ , all three possible structures may be drawn as follows. Statement (II) : Structure III is most stable, as the orbitals ha

JEE Main 2025 Solution View → 32

A metal complex with a formula MC ₄ 3 NH ₃ is involved in sp ^3 ~d ^2 hybridisation. It upon reaction with excess of AgNO ₃ solution gives ' x ' moles of AgCl. Consider ' x ' is eq

JEE Main 2025 Solution View → 33

Which of the following molecules(s) show/s paramagnetic behavior? (A) O ₂ (B) N ₂ (C) F ₂ (D) S ₂ (E) Cl ₂ Choose the correct answer from the options given below :

JEE Main 2025 Solution View → 34

In 3, 3-dimethylhex-1-ene-4-yne, there are _______ sp ^3 , _______ sp ^2 and _______ sp hybridised carbon atoms respectively :

JEE Main 2025 Solution View → 35

Which among the following molecules is (a) involved in sp ^3 ~d hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?

JEE Main 2025 Solution View → 36

Among ( SO ₂, NF ₃, NH ₃, XeF ₂, ClF ₃ ) and ( SF ₄ ), the hybridization of the molecule with non-zero dipole moment and highest number of lone-pairs of electrons on the central at

JEE Main 2025 Solution View → 37

A molecule with the formula ( AX ₄ Y ) has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy va

JEE Main 2025 Solution View → 38

Total number of sigma ( ) and pi ( ) bonds respectively present in hex-1-en-4-yne are :

JEE Main 2025 Solution View → 39

The correct option with order of melting points of the pairs (( Mn , Fe ),( Tc , Ru ) ) and (( Re , Os ) ) is :

JEE Main 2025 Solution View → 40

The sum of sigma (( ) ) and pi (( ) ) bonds in Hex-1,3-dien-5-yne is _______.

JEE Main 2025 Solution View → 41

Total number of molecules/species from following which will be paramagnetic is ______ O ₂, O ₂⁺, O ₂⁻, NO , NO ₂, CO , K ₂ [ NiCl ₄ ], [ Co ( NH ₃ )₆ ] Cl ₃, ~K ₂ [ Ni ( CN )₄ ]

JEE Main 2025 Solution View → 42

The molecules having square pyramidal geometry are

JEE Main 2025 Solution View → 43

Given below are two statements : Statement (I): Experimentally determined oxygen-oxygen bond lengths in the O ₃ are found to be same and the bond length is greater than that of a O

JEE Main 2025 Solution View → 44

Given below are two statements : Statement (I) : The first ionization energy of Pb is greater than that of Sn . Statement (II) : The first ionization energy of Ge is greater than t

JEE Main 2025 Solution View → 45

In the given structure, number of sp and sp ^2 hybridized carbon atoms present respectively are :

JEE Main 2025 Solution View → 46

Which of the following statement is true with respect to H ₂ O , NH ₃ and CH ₄ ? A. The central atoms of all the molecules are sp ^3 hybridized. B. The H - O - H , H - N - H and H

JEE Main 2025 Solution View → 47

Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z -direction] ? A.

JEE Main 2025 Solution View → 48

Match the List-I with List-II Choose the correct answer from the options given below:

JEE Main 2025 Solution View → 49

Arrange the following compounds in increasing order of their dipole moment : HBr , H ₂ ~S , NF ₃ and CHCl ₃

JEE Main 2025 Solution View → 50

The number of molecules/ions that show linear geometry among the following is ________ SO ₂, BeCl ₂, CO ₂, ~N ₃⁻, NO ₂, ~F ₂ O , XeF ₂, NO ₂⁺, I ₃⁻, O ₃

JEE Main 2025 Solution View → 51

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

JEE Advanced 2024 Solution View → 52

Based on VSEPR model, match the xenon compounds given in List-I with the corresponding geometries and the number of lone pairs on xenon given in List-II and choose the correct opti

JEE Advanced 2024 Solution View → 53

The correct increasing order for bond angles among ( BF ₃, PF ₃ ) and ( ClF ₃ ) is :

JEE Main 2024 Solution View → 54

The incorrect statement regarding ethyne is

JEE Main 2024 Solution View → 55

Total number of electrons present in ( ( ^* ) ) molecular orbitals of ( O ₂, O ₂ ⁺ ) and ( O ₂⁻ ) is _______.

JEE Main 2024 Solution View → 56

In which one of the following pairs the central atoms exhibit ( sp ^2 ) hybridization ?

JEE Main 2024 Solution View → 57

The total number of species from the following in which one unpaired electron is present, is _______ ( N ₂, O ₂, C ₂⁻, O ₂⁻, O ₂²⁻, H ₂⁺, CN ⁻, He ₂⁺ )

JEE Main 2024 Solution View → 58

The shape of carbocation is :

JEE Main 2024 Solution View → 59

When ( _ A ) and ( _ B ) are the wave functions of atomic orbitals, then ( ^* ) is represented by :

JEE Main 2024 Solution View → 60

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 )

JEE Main 2024 Solution View → 61

Match List I with List II ( array |l|l|l|l| & List-I & & List-II & (Molecule) & & (Shape) A. & NH ₃ & I. & Square pyramid B. & BrF ₅ & II. & Tetrahedral C. & PCl ₅ & III. & Trigona

JEE Main 2024 Solution View → 62

Match List I with List II ( array |l|l|l|l| & List-I & & List-II & (Molecule) & & (Shape) A. & Fe ₄ [ Fe ( CN )₆ ]₃ xH ₂ O & I. & Violet B. & [ Fe ( CN )₅ NOS ⁴⁻ . & II. & Blood Re

JEE Main 2024 Solution View → 63

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

JEE Main 2024 Solution View → 64

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 )

JEE Main 2024 Solution View → 65

An amine (( X ) ) is prepared by ammonolysis of benzyl chloride. On adding p-toluenesulphonyl chloride to it the solution remains clear. Molar mass of the amine (X) formed is _____

JEE Main 2024 Solution View → 66

Match List I with List II ( array |l|l|l|l| & List - I & & List - II & (Hybridization) & & (Orientation in Space) A. & sp ^3 & I. & Trigonal bipyramidal B. & dsp ^2 & II. & Octahed

JEE Main 2024 Solution View → 67

Match List I with List II ( array |l|l|l|l| & List - I & & List - II & (Compound/Species) & & (Shape/Geometry) A. & SF ₄ & I. & Tetrahedral B. & BrF ₃ & II. & Pyramidal C. & BrO ₃⁻

JEE Main 2024 Solution View → 68

Match List I with List II ( array |l|l|l|l| & List - I & & List - II & (Molecule/Species) & & (Property/Shape) A. & SO ₂ Cl ₂ & I. & Paramagnetic B. & NO & II. & Diamagnetic C. & N

JEE Main 2024 Solution View → 69

Number of molecules from the following which can exhibit hydrogen bonding is _______ (nearest integer)

JEE Main 2024 Solution View → 70

Match List I with List II ( array llll 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 array

JEE Main 2024 Solution View → 71

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : ( NH ₃ ) and ( NF ₃ ) molecule have pyramidal shape with

JEE Main 2024 Solution View → 72

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 )

JEE Main 2024 Solution View → 73

In the lewis dot structure for ( NO ₂⁻ ), total number of valence electrons around nitrogen is _______

JEE Main 2024 Solution View → 74

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 ) bondin

JEE Main 2024 Solution View → 75

The number of species from the following that have pyramidal geometry around the central atom is _______. ( S ₂ O ₃²⁻, SO ₄²⁻, SO ₃²⁻, S ₂ O ₇²⁻ )

JEE Main 2024 Solution View → 76

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 )

JEE Main 2024 Solution View → 77

Which one of the following molecules has maximum dipole moment?

JEE Main 2024 Solution View → 78

Number of molecules/ions from the following in which the central atom is involved in ( sp ^3 ) hybridization is ( ) ( NO ₃⁻, BCl ₃, ClO ₂⁻, ClO ₃ )

JEE Main 2024 Solution View → 79

Number of molecules/species from the following having one unpaired electron is ( ) ( O ₂, O ₂⁻¹, NO , CN ⁻¹, O ₂²⁻ )

JEE Main 2024 Solution View → 80

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 nod

JEE Main 2024 Solution View → 81

Select the compound from the following that will show intramolecular hydrogen bonding.

JEE Main 2024 Solution View → 82

Arrange the bonds in order of increasing ionic character in the molecules. LiF , K 2 O , N 2 , SO 2 and ClF 3 .

JEE Main 2024 Solution View → 83

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

JEE Main 2024 Solution View → 84

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R . Assertion A : PH 3 has lower boiling point than NH 3 . Reason R : In liquid s

JEE Main 2024 Solution View → 85

Which of the following is least ionic?

JEE Main 2024 Solution View → 86

A diatomic molecule has a dipole moment of 1 .2 D . If the bond distance is 1 A o , then fractional charge on each atom is _____ × 10 − 1 esu. (Given 1 D = 10 − 18 esu cm )

JEE Main 2024 Solution View → 87

The number of species from the following in which the central atom uses sp 3 hybrid orbitals in its bonding is _________. NH 3 , SO 2 , SiO 2 , BeCl 2 , CO 2 , H 2 O , CH 4 , BF 3

JEE Main 2024 Solution View → 88

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

JEE Main 2024 Solution View → 89

Given below are two statements: Statement-I: Since fluorine is more electronegative than nitrogen, the net dipole moment of NF 3 is greater than NH 3 . Statement-II: In NH 3 , the

JEE Main 2024 Solution View → 90

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 e

JEE Main 2024 Solution View → 91

Match List - I with List-II List I (Molecule) List II (Shape) A. BrF 5 i. T-shape B. H 2 O ii. See saw C. ClF 3 iii. Bent D. SF 4 iv. Square pyramidal

JEE Main 2024 Solution View → 92

The total number of molecular orbitals formed from 2 s and 2 p atomic orbitals of a diatomic molecule

JEE Main 2024 Solution View → 93

The total number of molccules with zero dipole moment among CH 4 , BF 3 , H 2 O , HF , NH 3 , CO 2 and SO 2 is ______.

JEE Main 2024 Solution View → 94

The total number of 'Sigma' and Pi bonds in 2-formylhex-4-enoic acid is

JEE Main 2024 Solution View → 95

The total number of anti bonding molecular orbitals, formed from 2 s and 2 p atomic orbitals in a diatomic molecule is _____________.

JEE Main 2024 Solution View → 96

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

JEE Main 2024 Solution View → 97

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 + , B 2

JEE Main 2024 Solution View → 98

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

JEE Main 2024 Solution View → 99

Sum of bond order of CO and NO + is

JEE Main 2024 Solution View → 100

Choose the polar molecule from the following :

JEE Main 2024 Solution View → 101

The correct molecular orbital diagram for F 2 molecule in the ground state is

JEE Advanced 2023 Solution View → 102

Among I 3 + , SiO 4 4 - , SO 2 Cl 2 , XeF 2 , SF 4 , ClF 3 , Ni CO 4 , XeO 2 F 2 , PtCl 4 2 - , XeF 4 , and SOCl 2 , the total number of species having sp 3 hybridised central atom

JEE Advanced 2023 Solution View → 103

Consider the following statement (A) NF 3 molecules has a trigonal planar structure. (B) Bond Length of N 2 is shorter than O 2 . (C) Isoelectronic molecules or ions have identical

JEE Main 2023 Solution View → 104

Match Lis-I with List-II. List-1 List-II A. Weak intermolecular forces of attraction I. Hexamethylenediamine + adipic acid B. Hydrogen bonding II. AlEt 3 + TiCl 4 C. Heavily branch

JEE Main 2023 Solution View → 105

Given below are two statements : Statement I : SO 2 and H 2 O both possess V-shaped structure Statement II : The bond angle of SO 2 is less than that of H 2 O . In the light of the

JEE Main 2023 Solution View → 106

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one?

JEE Main 2023 Solution View → 107

ClF 5 at room temperature is a

JEE Main 2023 Solution View → 108

Among the following compounds, the one which shows highest dipole moment is

JEE Main 2023 Solution View → 109

The bond order and magnetic property of acetylide ion are same as that of

JEE Main 2023 Solution View → 110

Given below are two statements: Statement I: SbCl 5 is more covalent than SbCl 3 Statement II: The higher oxides of halogens also tend to be more stable than the lower ones. In the

JEE Main 2023 Solution View → 111

Which one of the following pairs is an example of polar molecular solids?

JEE Main 2023 Solution View → 112

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 -

JEE Main 2023 Solution View → 113

Match List-I with List-II: List-I Species List-II Geometry/Shape A. H 3 O + I. Tetrahedral B. Acetylide anion II. Linear C. NH 4 + III. Pyramidal D. ClO 2 - IV. Bent Choose the cor

JEE Main 2023 Solution View → 114

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

JEE Main 2023 Solution View → 115

The pair from the following pairs having both compounds with net non-zero dipole moment is

JEE Main 2023 Solution View → 116

The compound which does not exist is

JEE Main 2023 Solution View → 117

The number of bent-shaped molecule/s from the following is ______ N 3 - , NO 2 - , I 3 - , O 3 , SO 2

JEE Main 2023 Solution View → 118

The sum of lone pairs present on the central atom of the interhalogen IF 5 and IF 7 is ______

JEE Main 2023 Solution View → 119

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

JEE Main 2023 Solution View → 120

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 ethoxye

JEE Main 2023 Solution View →
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