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Chemical Bonding and Molecular Structure — NEET UG Chemistry PYQs

1,423 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.

1,423 questionsChemistrySolutions on every page
1

Which of the following molecules shows sp ^3 d hybridisation?

MHT CET Medical 2026 Solution View → 2

Identify a pair of molecules having zero dipole moment.

MHT CET Medical 2026 Solution View → 3

Identify the correct decreasing order of lattice enthalpy for metal fluorides from following.

MHT CET Medical 2026 Solution View → 4

Which of the following bonds is expected to be the most polar?

MHT CET Medical 2026 Solution View → 5

Which of the following species is paramagnetic?

MHT CET Medical 2026 Solution View → 6

What is the number of bonding and antibonding electrons, respectively, in Li ₂ molecule?

MHT CET Medical 2026 Solution View → 7

What is the number of electrons in bonding molecular orbitals and antibonding molecular orbitals respectively in F ₂ molecule?

MHT CET Medical 2026 Solution View → 8

Identify the hybridization in BF ₃ molecule.

MHT CET Medical 2026 Solution View → 9

Identify a hydride with highest boiling point from following?

MHT CET Medical 2026 Solution View → 10

Which orbital overlap produces a bond in HCl?

MHT CET Medical 2026 Solution View → 11

The bond order of N ₂^+ ion is:

MHT CET Medical 2026 Solution View → 12

What is the bond angle Cl-B-Cl and molecular geometry of BCl ₃ molecule?

MHT CET Medical 2026 Solution View → 13

Which one of the following is NOT an example of an expanded octate?

MHT CET Medical 2026 Solution View → 14

Which of the following is the decreasing order of covalent character of alkali metal halides?

MHT CET Medical 2026 Solution View → 15

Which of the following compounds has the highest boiling point?

MHT CET Medical 2026 Solution View → 16

The correct formal charges on oxygen atoms numbered 2 , 1 and 3 respectively are :

NEET 2026 Solution View → 17

Match List I with List II : List I List II A. C ₂ H ₄ I. 3 bonds, 2 bonds B. C ₂ H ₂ II. 3 bonds, one lone pair C. CH ₄ III. 4 bonds D. NH ₃ IV. 5 bonds, 1 bond Choose the correct

NEET 2026 Solution View → 18

Match the species in List I with their geometry in List II List I List II A. PCl₅ I. Tetrahedral B. BrF₅ II. Square Planar C. BF₄^- III. Trigonal bipyramidal D. [Ni(CN)₄ ] ²⁻ IV. S

NEET 2026 Solution View → 19

The highest occupied molecular orbital for N e₂ is

NEET 2026 Solution View → 20

Identify the correct statement about ClF ₃ from the following options :

NEET 2026 Solution View → 21

Identify the correct orders against the property mentioned (A) H ₂ O NH ₃ CHCl ₃ - dipole moment (B) XeF ₄ XeO ₃ XeF ₂- number of lone pairs on central atom (C) O - H C - H N - O -

NEET 2025 Solution View → 22

Given below are two statements : Statement I : A hypothetical diatomic molecule with bond order zero is quite stable. Statement II : As bond order increases, the bond length increa

NEET 2025 Solution View → 23

Arrange the following compounds in increasing order of their solubilities in chloroform: NaCl , CH ₃ OH , cyclohexane, CH ₃ CN

NEET 2024 Solution View → 24

Identify the incorrect statement about PCl ₅ .

NEET 2024 Solution View → 25

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

NEET 2024 Solution View → 26

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

NEET 2024 Solution View → 27

Identify the correct answer.

NEET 2024 Solution View → 28

Which of the following molecules has "NON ZERO" dipole moment value?

NEET 2024 Solution View → 29

Intramolecular hydrogen bonding is present in

NEET 2024 Solution View → 30

The correct order of dipole moments for molecules NH ₃, H ₂ ~S , CH ₄ and HF , is

NEET 2023 Solution View → 31

Which one of the following statements is incorrect related to Molecular Orbital Theory?

NEET 2023 Solution View → 32

The correct order of energies of molecular orbitals of N 2 molecule, is:

NEET 2023 Solution View → 33

Intermolecular forces are forces of attraction and repulsion between interacting particles that will include : A. dipole-dipole forces. B. dipole-induced dipole forces. C. hydrogen

NEET 2023 Solution View → 34

The number of σ bonds, π bonds and lone pair of electrons in pyridine, respectively.

NEET 2023 Solution View → 35

Amongst the following, the total number of species NOT having eight electrons around central atom in its outer most shell, is NH 3 ,   AlCl 3 ,   BeCl 2 ,   CCl 4 ,

NEET 2023 Solution View → 36

The correct order of bond angles in the following compounds/species is :

NEET 2022 Solution View → 37

Match List-I with List-II : ( array l|l List - I & List - II (Molecules) & Shape (a) NH ₃ & (i) Square pyramidal (b) ClF ₃ & (ii) Trigonal bipyramidal (c) PCl ₅ & (iii) Trigonal py

NEET 2022 Solution View → 38

What is the hybridization shown by C ₁ and C ₂ carbons, respectively in the given compound? OHC - CH = CH - CH ₂ COOCH ₃

NEET 2022 Solution View → 39

The decreasing order of boiling points of the following alkanes is: (a) Heptane (b) butane (c) 2-methylbutane (d) 2-methylpropane (e) hexane Choose the correct answer from the opti

NEET 2022 Solution View → 40

Given below are two statements: Statement I: The boiling points of the following hydrides of group 16 elements increases in the order - H 2 O < H 2 S < H 2 Se < H 2 Te

NEET 2022 Solution View → 41

Amongst the following which one will have maximum 'lone pair - lone pair' electron repulsions?

NEET 2022 Solution View → 42

Which amongst the following is incorrect statement?

NEET 2022 Solution View → 43

Given below are two statements: Statement I : The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular asso

NEET 2022 Solution View → 44

The correct sequence of bond enthalpy of ' C - X bond is:

NEET 2021 Solution View → 45

Which of the following molecules is non-polar in nature?

NEET 2021 Solution View → 46

Match List - I with List - II. List-I List-II (a) PCl 5 (i) Square pyramidal (b) SF 6 (ii) Trigonal planar (c) Br F 5 (iii) Octahedral (d) BF 3 (iv) Trigonal bipyramidal Choose the

NEET 2021 Solution View → 47

BF 3 is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are:

NEET 2021 Solution View → 48

Among the compounds shown below which one revealed a linear structure?

NEET 2020 Solution View → 49

Identify the wrongly matched pair:

NEET 2020 Solution View → 50

How many (i) sp 2 hybridised carbon atoms and (ii) π bonds are present in the following compound?

NEET 2020 Solution View → 51

Identify a molecule which does not exist.

NEET 2020 Solution View → 52

Which of the following set of molecules will have zero dipole moment?

NEET 2020 Solution View → 53

Among the following, the number of compounds having zero lone pair of electrons on central atom is XeO ₃, XeO ₂ ~F ₂, XeO ₄, XeO ₃ ~F ₂, XeF ₄

AIIMS 2019 Solution View → 54

Assertion : S ₂ O ₇²⁻ and Cr ₂ O ₇²⁻ both exist. Reason : Both have same valence electrons.

AIIMS 2019 Solution View → 55

Which is least soluble in water?

AIIMS 2019 Solution View → 56

Assertion : LiCl is predominantly a covalent compound. Reason : Electronegativity difference between Li and Cl is too small.

AIIMS 2019 Solution View → 57

When Ag ⁺ reacts with excess of sodium thiosulphate then the obtained species have charge and geometry respectively

AIIMS 2019 Solution View → 58

Select the correct statement regarding shapes of PCl ₅, BrF ₅ and IF ₇ .

AIIMS 2019 Solution View → 59

Which of the following is incorrect about cyanogen gas?

AIIMS 2019 Solution View → 60

Assertion : BO ₃³⁻ and SO ₃²⁻ are not isostructural. Reason : In SO ₃²⁻ , sulphur has one lone pair of electrons.

AIIMS 2019 Solution View → 61

Which of the following statements about CO ₃²⁻ ion is correct?

AIIMS 2019 Solution View → 62

Which of the following can form H -bond?

JIPMER 2019 Solution View → 63

What is hybridisation of O in H ₂ O ?

JIPMER 2019 Solution View → 64

Which of the following is correct?

JIPMER 2019 Solution View → 65

Which of the following has octet around central atom?

JIPMER 2019 Solution View → 66

Number of and bonds in C ₂ H ₂ is respectively

JIPMER 2019 Solution View → 67

Which of the following is paramagnetic?

NEET 2019 Solution View → 68

The number of hydrogen bonded water molecule(s) associated with CuSO ₄ 5 H ₂ O is

NEET 2019 Solution View → 69

Which of the following is the correct order of dipole moment?

NEET 2019 Solution View → 70

The number of sigma σ and pi π bonds in pent- 2 -en- 4 -yne is:

NEET 2019 Solution View → 71

Which of the following diatomic molecular species has only π bonds according to Molecular Orbital Theory?

NEET 2019 Solution View → 72

The manganate and permanganate ions are tetrahedral, due to:

NEET 2019 Solution View → 73

The correct structure of tribromooctaoxide is:

NEET 2019 Solution View → 74

Which of the following is incorrect statement?

NEET 2019 Solution View → 75

Identify the incorrect statement related to P C l 5 from the following:

NEET 2019 Solution View → 76

Which pair of molecules does not have identical structure?

AIIMS 2018 Solution View → 77

Assertion : Si - Si bonds are much stronger than Si - O bonds. Reason : Silicon forms double bonds with itself.

AIIMS 2018 Solution View → 78

Which of the following have same hybridisation but are not isostructural?

AIIMS 2018 Solution View → 79

Which of the following is correct regarding bond angles? (i) SO ₂ < H ₂ O (ii) H ₂ ~S < SO ₂ (iii) SO ₂ < H ₂ ~S (iv) SbH ₃ < NO ₂⁺

AIIMS 2018 Solution View → 80

Which of the following has maximum % of s -character?

AIIMS 2018 Solution View → 81

Which of the following pairs does not have same bond order?

AIIMS 2018 Solution View → 82

Which of the following pairs have different hybridisation and same shape? (i) NO ₃⁻ and CO ₃²⁻ (ii) SO ₂ and NH ₂⁻ (iii) XeF ₂ and CO ₂ (iv) H ₂ O and NH ₃

AIIMS 2018 Solution View → 83

Assertion : Surface tension of water is more than many other liquids. Reason : Water molecules have strong intermolecular H -bonding as attractive force.

AIIMS 2018 Solution View → 84

Which of the following order is correct?

AIIMS 2018 Solution View → 85

For the dot structure shown, the most likely elements X = and Y = are

JIPMER 2018 Solution View → 86

Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their

NEET 2018 Solution View → 87

In the structure of ClF 3 , the number of lone pairs of electrons on the central atom Cl is

NEET 2018 Solution View → 88

Among CaH 2 , &#160; BeH 2 , &#160; BaH 2 , what is the order of ionic character?

NEET 2018 Solution View → 89

Consider the following species, CN + , &#160; CN - 1 , &#160; NO &#160; and &#160; CN Which one of these will have the highest bond order?

NEET 2018 Solution View → 90

Which of the following molecules represents the order of hybridization sp 2 , &#160; sp 2 , &#160; sp , &#160; sp from left to right atoms?

NEET 2018 Solution View → 91

H ₂ O is polar, whereas BeF ₂ is not because

AIIMS 2017 Solution View → 92

Which of the following electronic configurations has maximum energy?

AIIMS 2017 Solution View → 93

Assertion: The second dissociation constant of fumaric acid is greater than maleic acid. Reason : Higher the dissociation constant of acid, more is the acidic character.

AIIMS 2017 Solution View → 94

Assertion: Both (2 p_x ) and ^* (2 p_x ) MO's have one nodal plane each. Reason: All MO's formed by side way overlapping of 2 p -orbitals have one nodal plane.

AIIMS 2017 Solution View → 95

Hydride of boron occurs as B ₂ H ₆ but B ₂ Cl ₆ does not exist. This is because

AIIMS 2017 Solution View → 96

Among the following compounds, which compound is polar as well as exhibit s p^2 -hybridisation by the central atom

JIPMER 2017 Solution View → 97

Which of the following is least soluble in water?

JIPMER 2017 Solution View → 98

The shape of gaseous SnCl ₂ is

JIPMER 2017 Solution View → 99

The species having bond angles of 120 &#176; is

NEET 2017 Solution View → 100

Which of the following pairs of compounds is isoelectronic and isostructural?

NEET 2017 Solution View → 101

Which one of the following pairs of species has the same bond order?

NEET 2017 Solution View → 102

Match the interhalogen compounds of column I with the geometry in column II and assign the correct code. Column I Column II a. XX &#8242; (i) T-shape b. XX 3 &#8242; (ii) Pentagona

NEET 2017 Solution View → 103

Which of the following molecules has more than one lone pair?

AIIMS 2016 Solution View → 104

Four diatomic species are listed below in different sequences. Which of these represents the correct order of their increasing bond order?

AIIMS 2016 Solution View → 105

Assertion : bond angle is less than the normal tetrahedral bond angle. Reason : Lone pair-lone pair repulsion decreases bond angle.

AIIMS 2016 Solution View → 106

Assertion : Diamagnetic substances are not attracted by magnetic field. Reason : Diamagnetic substances have no unpaired electrons.

AIIMS 2016 Solution View → 107

Choose the correct statement from the following

JIPMER 2016 Solution View → 108

Which of the following pair of compounds will have three s p^2 -hybrid orbitals?

JIPMER 2016 Solution View → 109

The hybridization of atomic orbitals of nitrogen in NO 2 + , &#160; NO 3 - and NH 4 + respectively are

NEET 2016 Solution View → 110

Which of the following pairs of ions is isoelectronic and isostructural?

NEET 2016 Solution View → 111

Among the following, which one is a wrong statement?

NEET 2016 Solution View → 112

Predict the correct order among the following:

NEET 2016 Solution View → 113

Match the compounds given in column I with the hybridization and shape given in column II and mark the correct option. Column I Column II (a) X e F 6 (i) Distorted octahedral (b) X

NEET 2016 Solution View → 114

Consider the molecules C H 4 , &#160; N H 3 and H 2 O . Which of the given statements is false?

NEET 2016 Solution View → 115

Assertion : Molecular nitrogen is less reactive than molecular oxygen. Reason : The bond length of N ₂ is shorter than that of oxygen.

AIIMS 2015 Solution View → 116

Which of the following represents the correct order of decreasing number of S = O bonds?

JIPMER 2015 Solution View → 117

The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic spec

JIPMER 2015 Solution View → 118

In which of the following pairs, both the species are not isostructural?

NEET 2015 Solution View → 119

Which of the following species contains equal number of &#963; - and &#960; - bonds?

NEET 2015 Solution View → 120

Decreasing order of stability of O 2 , &#160; O 2 - , &#160; O 2 + and O 2 2 - is:

NEET 2015 Solution View →
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