Chemical Bonding & Molecular Structure · Chemistry · JEE Advanced
MCQ (Single Correct Answer)
1
The species having bond order different from that in CO is
IIT-JEE 2007
2
Among the following the paramagnetic compound is
IIT-JEE 2007
3
The correct order of ONO bond angle in the given species is :
JEE Advanced 2026 Paper 2 Online
4
The correct order of dipole moments for the given species is
JEE Advanced 2026 Paper 1 Online
5
Consider the following species:
SOCl$_2$, XeOF$_4$, ClF$_3$, ClF$_5$, XeF$_5^+$, SO$_3^{2-}$, XeF$_3^+$, SF$_4$
List-I contains different molecular shapes and List-II contains total number of species with the same molecular shapes from the given species. Match each entry in List-I with the appropriate entry in List-II and choose the correct option.
| List-I | List-II |
|---|---|
| (P) See-saw | (1) one |
| (Q) T-Shaped | (2) two |
| (R) Trigonal Planar | (3) three |
| (S) Square Pyramidal | (4) four |
| (5) zero |
JEE Advanced 2026 Paper 1 Online
6
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 option.
| List-I | List-II |
|---|---|
| (P) XeF$_2$ | (1) Trigonal bipyramidal and two lone pair of electrons |
| (Q) XeF$_4$ | (2) Tetrahedral and one lone pair of electrons |
| (R) XeO$_3$ | (3) Octahedral and two lone pair of electrons |
| (S) XeO$_3$F$_2$ | (4) Trigonal bipyramidal and no lone pair of electrons |
| (5) Trigonal bipyramidal and three lone pair of electrons |
JEE Advanced 2024 Paper 1 Online
7
The correct molecular orbital diagram for $\mathrm{F}_2$ molecule in the ground state is :
JEE Advanced 2023 Paper 2 Online
8
Assuming 2s – 2p mixing is NOT operative, the paramagnetic species among the following is
JEE Advanced 2014 Paper 2 Offline
9
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 Advanced 2014 Paper 2 Offline
10
The shape of XeO2F2 molecule is
IIT-JEE 2012 Paper 2 Offline
11
The species having pyramidal shape is
IIT-JEE 2010 Paper 2 Offline
12
Assuming that Hund’s rule is violated, the bond order and magnetic nature of the diatomic molecule B2 is
IIT-JEE 2010 Paper 2 Offline
13
Match each of the diatomic molecules in Column I with its property/properties in Column II:
| Column I | Column II | ||
|---|---|---|---|
| (A) | $${B_2}$$ | (P) | Paramagnetic |
| (B) | $${N_2}$$ | (Q) | Undergoes oxidation |
| (C) | $$O_2^ - $$ | (R) | Undergoes reduction |
| (D) | $${O_2}$$ | (S) | Bond order $$\ge$$ 2 |
| (T) | Mixing of $$s$$ and $$p$$ orbitals |
IIT-JEE 2009 Paper 1 Offline
14
The species having bond order different from that in CO is :
IIT-JEE 2007 Paper 1 Offline
15
Among the following the paramagnetic compound is:
IIT-JEE 2007 Paper 1 Offline
16
Statement 1 : Boron always forms covalent bond.
Statement 2 : The small size of B$$^{3+}$$ favours formation of covalent bond.
IIT-JEE 2007 Paper 1 Offline
17
Which species has the maximum number of lone pair of electrons on the central atom?
IIT-JEE 2005 Screening
18
According to molecular orbital theory which of the following statement about the magnetic character and bond order is correct regarding $$O_2^+$$
IIT-JEE 2004 Screening
19
Which of the following molecular species has unpaired electrons(s)?
IIT-JEE 2002 Screening
20
The common features among the species CN-, CO and NO+ are :
IIT-JEE 2001 Screening
21
Molecular shape of SF4, CF4 and XeF4 are
IIT-JEE 2000 Screening
22
The hybridisation of atomic orbitals of nitrogen in $$NO_2^+$$, $$NO_3^-$$ and $$NH_4^+$$ are
IIT-JEE 2000 Screening
23
The correct order of increasing C - O bond length of CO, $$CO_3^{2-}$$, CO2 is
IIT-JEE 1999
24
The geometry of H2S and its dipole moment are
IIT-JEE 1999
25
The geometry and the type of hybrid orbital present about the central atom in BF3 is
IIT-JEE 1998
26
Read the following Assertion and Reason and answer as per the options given below
Assetion: LiCl is predominantly a covalent compound
Reason : Electronegativity difference between Li and Cl is too small
Assetion: LiCl is predominantly a covalent compound
Reason : Electronegativity difference between Li and Cl is too small
IIT-JEE 1998
27
Which contains both polar and non-polar bonds?
IIT-JEE 1997
28
The critical temperature of water is higher than that of O2 because the H2O molecule has
IIT-JEE 1997
29
Which one of the following compounds has sp2 hybridization?
IIT-JEE 1997
30
Among the following species, identity the isostructural pairs NF3, $$NO_3^-$$, BF3, H3O+ , HN3
IIT-JEE 1996
31
The number and type of bonds between two carbon atoms in CaC2 are:
IIT-JEE 1996
32
Number of paired electrons in O2 molecules is
IIT-JEE 1995 Screening
33
Which one is most ionic
IIT-JEE 1995 Screening
34
Pick out the isoelectronic structures from the following
I. $$CH_3^+$$
II. $$H_3O^+$$
III. $$NH_3$$
IV. $$CH_3^-$$
I. $$CH_3^+$$
II. $$H_3O^+$$
III. $$NH_3$$
IV. $$CH_3^-$$
IIT-JEE 1993
35
The cyanide ion, CN- and N2 are isoelectronic, But in contrast to CN-, N2 is chemically inert, because of
IIT-JEE 1992
36
The type of hybrid orbitals used by the chlorine atom in $$ClO_2^-$$ is
IIT-JEE 1992
37
The maximum number of hydrogen bonds a water molecule can form is
IIT-JEE 1992
38
Which of the following is paramagnetic?
IIT-JEE 1989
39
The molecule which has zero dipole moment is:
IIT-JEE 1989
40
The molecule which has pyramidal shape is
IIT-JEE 1989
41
The compound in which $$\mathop C\limits^* $$ uses its sp3 hybrid orbitals for bond formation is
IIT-JEE 1989
42
The molecule that has linear structure is
IIT-JEE 1988
43
The species in which the central atom uses sp2 hybrid orbitals in its bonding is
IIT-JEE 1988
44
Hydrogen bond is maximum in
IIT-JEE 1987
45
The hybridisation of sulphur in sulphur dioxide is
IIT-JEE 1986
46
The bond between two identical non-metal atoms has a pair of electrons
IIT-JEE 1986
47
The hydrogen bond is strongest in
IIT-JEE 1986
48
The molecule having one unpaired electron is
IIT-JEE 1985
49
On hybridization of one s and one p orbitals we get:
IIT-JEE 1984
50
The types of bonds present in CuSO4.5H2O are only
IIT-JEE 1983
51
Carbon tetrachloride has no net dipole moment because of
IIT-JEE 1983
52
Which one among the following does not have the hydrogen bond?
IIT-JEE 1983
53
Among the following, the molecule that is linear is
IIT-JEE 1982
54
The compound with no dipole moment is
IIT-JEE 1982
55
If a molecule MX3 has zero dipole moment, the sigma bonding orbitals used by M (atomic number < 21) are
IIT-JEE 1981
56
Which of the following compounds are covalent?
IIT-JEE 1980
57
The total number of electrons that take part in forming the bond in N2 is
IIT-JEE 1980
58
Element X is strongly electropositive and element Y is strongly electronegative. Both are univalent. The compound formed would be
IIT-JEE 1980
59
Which of the following is soluble in water?
IIT-JEE 1980
60
The compound which contains both ionic and covalent bonds is
IIT-JEE 1979
61
The octet rule is not valid for the molecule
IIT-JEE 1979
MCQ (More than One Correct Answer)
1
The correct statement(s) about intermolecular forces is(are)
JEE Advanced 2025 Paper 2 Online
2
Regarding the molecular orbital (MO) energy levels for homonuclear diatomic molecules, the INCORRECT statement(s) is(are)
JEE Advanced 2025 Paper 1 Online
3
The option(s) in which at least three molecules follow Octet Rule is(are)
JEE Advanced 2024 Paper 1 Online
4
Each of the following options contains a set of four molecules. Identify the option(s) where all four molecules posses permanent dipole moment at room temperature.
JEE Advanced 2019 Paper 1 Offline
5
According to Molecular Orbital Theory, which of the following statements is(are) correct?
JEE Advanced 2016 Paper 2 Offline
6
The compound(s) with TWO lone pairs of electrons on the central atom is(are)
JEE Advanced 2016 Paper 1 Offline
7
Hydrogen bonding plays a central role in the following phenomena
JEE Advanced 2014 Paper 1 Offline
8
The molecules that will have dipole moment are
IIT-JEE 1992
9
Which of the following have identical bond order?
IIT-JEE 1992
10
The linear structure is assumed by :
IIT-JEE 1991
11
CO2 is isostructural with
IIT-JEE 1986
Numerical
1
Among $\left[\mathrm{I}_3\right]^{+},\left[\mathrm{SiO}_4\right]^{4-}, \mathrm{SO}_2 \mathrm{Cl}_2, \mathrm{XeF}_2, \mathrm{SF}_4, \mathrm{ClF}_3, \mathrm{Ni}(\mathrm{CO})_4, \mathrm{XeO}_2 \mathrm{~F}_2,\left[\mathrm{PtCl}_4\right]^{2-}, \mathrm{XeF}_4$, and $\mathrm{SOCl}_2$, the total number of species having $s p^3$ hybridised central atom is ________.
JEE Advanced 2023 Paper 2 Online
2
Consider the following molecules: $\mathrm{Br}_3 \mathrm{O}_8, \mathrm{~F}_2 \mathrm{O}, \mathrm{H}_2 \mathrm{S}_4 \mathrm{O}_6, \mathrm{H}_2 \mathrm{S}_5 \mathrm{O}_6$, and $\mathrm{C}_3 \mathrm{O}_2$. Count the number of atoms existing in their zero oxidation state in each molecule.
Their sum is _______.
Their sum is _______.
JEE Advanced 2023 Paper 2 Online
3
Consider the following compounds in the liquid form :
O2, HF, H2O, NH3, H2O2, CCl4, CHCl3, C6H6, C6H5Cl
When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?
O2, HF, H2O, NH3, H2O2, CCl4, CHCl3, C6H6, C6H5Cl
When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?
JEE Advanced 2020 Paper 2 Offline
4
Among $${H_2},H{e_2}^ + ,L{i_2},$$ $$B{e_2},{B_2},{C_2},{N_2},O_2^ - $$ and $${F_2},$$ the number of diamagnetic species is
(Atomic numbers : $$H = 1,He = 2,$$ $$Li = 3,Be = 4,$$ $$B = 5,C = 6,$$ $$N = 7,$$ $$O = 8,F = 9$$)
(Atomic numbers : $$H = 1,He = 2,$$ $$Li = 3,Be = 4,$$ $$B = 5,C = 6,$$ $$N = 7,$$ $$O = 8,F = 9$$)
JEE Advanced 2017 Paper 1 Offline
5
Among the triatomic molecules/ions, BeCl2, $$N_3^-$$, N2O, $$NO_2^+$$, O3, SCl2, $$ICl_2^-$$, $$I_3^-$$ and XeF2, the total number of linear molecule(s)/ion(s) where the hybridization of the central atom does not have contribution from the d-orbital(s) is
[Atomic number: S = 16, Cl = 17, I = 53 and Xe = 54]
[Atomic number: S = 16, Cl = 17, I = 53 and Xe = 54]
JEE Advanced 2015 Paper 1 Offline
6
A list of species having the formula XZ4 is given below.
XeF4, SF4 ,SiF4, $$BF_4^-$$, $$BrF_4^-$$, [Cu(NH3)4]2+, [FeCl4]2-, [CoCl4]2- and [PtCl4]2-
Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is
XeF4, SF4 ,SiF4, $$BF_4^-$$, $$BrF_4^-$$, [Cu(NH3)4]2+, [FeCl4]2-, [CoCl4]2- and [PtCl4]2-
Defining shape on the basis of the location of X and Z atoms, the total number of species having a square planar shape is
JEE Advanced 2014 Paper 1 Offline
7
Based on VSEPR theory, the number of 90 degree F-Br-F angles in BrF5 is
IIT-JEE 2010 Paper 1 Offline
8
There are ______ $$\pi$$ bonds in a nitrogen molecule.
IIT-JEE 1982
Subjective
1
Predict whether the following molecules are iso-structural or not. Justify your answer.
(A) NMe$$_3$$
(B) N(SiMe$$_3$$)$$_3$$
IIT-JEE 2005 Mains
2
Given : that $${\mu _{obs}} = \sum {{\mu _i}\,{x_i}} $$ where $${\mu _i}$$ is the dipole moment of stable conformer and $${x_i}$$ is the mole fraction of that conformer.
(A) Write stable conformer for Z-CH$$_2$$-CH$$_2$$-Z in Newman's projection.
If $${\mu _{solution}}$$ = 1.0 D and mole fraction of anti-form = 0.82, find $${\mu _{Gauche}}$$.
(B) Write most stable meso conformer of
If (i) Y = CH$$_3$$ about C$$_2$$ - C$$_3$$ rotation and (ii) Y = OH about C$$_1$$ - C$$_2$$ rotation.
IIT-JEE 2005 Mains
3
Draw the structure of XeF4 and OSF4 according to VSEPR theory clearly indicating the state of hybridisation of the central atom and lone pair of electrons (if any) on the central atom.
IIT-JEE 2004
4
Arrange the following :
In the decreasing order of the O - O bond length present in them
O2, KO2 and O2[AsF4]
In the decreasing order of the O - O bond length present in them
O2, KO2 and O2[AsF4]
IIT-JEE 2004
5
Using VSEPR theory deduce the structures of PCl5 and BrF5
IIT-JEE 2003
6
Write down the M.O. electron distribution of O2. Specify its bond order and magnetic property.
IIT-JEE 2000
7
Interpret the non-linear shape of H2S molecule and non-planar shape of PCl3 using valence shell electron pair repulsion (VSEPR) theory. (Atomic numbers : H = 1, P = 15, S = 16, Cl = 17)
IIT-JEE 1998
8
A compound of vanadium has a magnetic moment of 1.73 BM. Work out the electronic configuration of the vanadium ion in the compound.
IIT-JEE 1997
9
Using the VSEPR theory, identify the type of hybridization and draw the structure of OF2. What are the oxidation states of O and F?
IIT-JEE 1994
10
The dipole moment of KCl is 3.336 $$\times$$ 10-29 Coulomb meters which indicates that it is a highly polar molecule. The interatomic distance between K+ and Cl- in this molecule is 2.6 $$\times$$ 10-10. Calculate the dipole moment of KCl molecule if there were opposite charges of one fundamental unit located at each nucleus. Calculate the percentage ionic character of KCl.
IIT-JEE 1993
11
Arrange the following :
Increasing strength of hydrogen bonding (X-H-X):
O, S, F, Cl, N
Increasing strength of hydrogen bonding (X-H-X):
O, S, F, Cl, N
IIT-JEE 1991
12
Arrange the following :
N2, O2, F2, Cl2 in increasing order of bond dissociation energy
N2, O2, F2, Cl2 in increasing order of bond dissociation energy
IIT-JEE 1988
13
Write the lewis dot structure of the following:
O3, COCl2
O3, COCl2
IIT-JEE 1986
14
How many sigma bonds and how many pi-bonds are present in a benzene molecule?
IIT-JEE 1985
Fill in the Blanks
1
When N2, the N-N bond distance _____ and when O2 goes to $$O_2^+$$ the O-O bond distance ___.
IIT-JEE 1996
2
The two types of bond present in B2H6 are covalent and _______.
IIT-JEE 1994
3
The shape of [CH3]+ is _____.
IIT-JEE 1990
4
____ hybrid orbitals of nitrogen atom are involved in the formation of ammonium ion.
IIT-JEE 1982
5
The angle between two convalent bonds is maximum in ________. (CH4, H2O, CO2)
IIT-JEE 1981
True or False
1
The dipole moment of CH3F is greater than of CH3Cl
IIT-JEE 1993
2
The presence of polar bonds in a poly-atomic molecule suggests that the molecule has non-zero dipole moment.
IIT-JEE 1990
3
In benzene, carbon uses all the three p-orbitals for hybridisation.
IIT-JEE 1987
4
sp2 hybrid orbitals have equal s and p character.
IIT-JEE 1987
5
All molecules with polar bonds have dipole moment.
IIT-JEE 1985
6
SnCl2 is a non-linear molecule
IIT-JEE 1985
7
Linear overlap of two atomic p-orbitals leads to a sigma bond.
IIT-JEE 1983