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JEE Advanced

Chemical Bonding & Molecular Structure

Chemistry

Previous Years Questions

MCQ (More than One Correct Answer)

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With respect to hypochlorite, chlorate and perchlorate ions, choose the correct statement(s).
JEE Advanced 2020 Paper 1 Offline
Each of the following options contains a set of four molecules. Identify the option(s) where all four molecules posses p...
JEE Advanced 2019 Paper 1 Offline
Among the following, the correct statement(s) is (are)
JEE Advanced 2017 Paper 2 Offline
The compound(s) with TWO lone pairs of electrons on the central atom is(are)
JEE Advanced 2016 Paper 1 Offline
According to Molecular Orbital Theory, which of the following statements is(are) correct?
JEE Advanced 2016 Paper 2 Offline
When O2 is adsorbed on a metallic surface, electron transfer occurs from the metal to O2. The true statement(s) regardin...
JEE Advanced 2015 Paper 2 Offline
Hydrogen bonding plays a central role in the following phenomena
JEE Advanced 2014 Paper 1 Offline
The molecules that will have dipole moment are
IIT-JEE 1992
Which of the following have identical bond order?
IIT-JEE 1992
The linear structure is assumed by
IIT-JEE 1991
CO2 is isostructural with
IIT-JEE 1986

Numerical

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The structure of a peptide is given below. If the absolute values of the net charge of the peptide at pH = 2, pH = 6, a...
JEE Advanced 2020 Paper 2 Offline
Consider the following compounds in the liquid form :O2, HF, H2O, NH3, H2O2, CCl4, CHCl3, C6H6, C6H5ClWhen a charged com...
JEE Advanced 2020 Paper 2 Offline
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...
JEE Advanced 2017 Paper 1 Offline
Among the triatomic molecules/ions, BeCl2, $$N_3^-$$, N2O, $$NO_2^+$$, O3, SCl2, $$ICl_2^-$$, $$I_3^-$$ and XeF2, the to...
JEE Advanced 2015 Paper 1 Offline
A list of species having the formula XZ4 is given below. XeF4, SF4 ,SiF4, $$BF_4^-$$, $$BrF_4^-$$, [Cu(NH)3]2+, [FeCl4]2...
JEE Advanced 2014 Paper 1 Offline
Based on VSEPR theory, the number of 90 degree F-BR-F angles in BrF5 is
IIT-JEE 2010 Paper 1 Offline
There are ______ $$\pi$$ bonds in a nitrogen molecule.
IIT-JEE 1982

MCQ (Single Correct Answer)

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The geometries of the ammonia complexes of Ni2+, Pt2+ and Zn2+, respectively, are
JEE Advanced 2016 Paper 2 Offline
Match the orbital overlap figures shown in List I with the description given in List II and select the correct answer us...
JEE Advanced 2014 Paper 2 Offline
Assuming 2s – 2p mixing is NOT operative, the paramagnetic species among the following is
JEE Advanced 2014 Paper 2 Offline
The shape of XeO2F2 molecule is
IIT-JEE 2012 Paper 2 Offline
Geometrical shapes of the complexes formed by the reaction of Ni2+ with Cl-, CN- and H2O respectively are...
IIT-JEE 2011 Paper 1 Offline
The species having pyramidal shape is
IIT-JEE 2010 Paper 2 Offline
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
Among the following the paramagnetic compound is
IIT-JEE 2007
The species having bond order different from that in CO is
IIT-JEE 2007
Which species has the maximum number of lone pair of electrons on the central atom?
IIT-JEE 2005 Screening
According to molecular orbital theory which of the following statement about the magnetic character and bond order is co...
IIT-JEE 2004 Screening
Which of the following are isoelectronic and isostructural? $$NO_3^-$$, $$CO_3^{2-}$$, $$ClO_3^-$$, SO3
IIT-JEE 2003 Screening
Which of the following molecular species has unpaired electrons(s)?
IIT-JEE 2002 Screening
Specify the coordination geometry around and hybridisation of N and B atoms in a 1 : 1 complex of BF3 and NH3 ...
IIT-JEE 2002 Screening
Identify the least stable ion amongst the following
IIT-JEE 2002 Screening
The common features among the species CN-, CO and NO+ are
IIT-JEE 2001 Screening
The hybridisation of atomic orbitals of nitrogen in $$NO_2^+$$, $$NO_3^-$$ and $$NH_4^+$$ are
IIT-JEE 2000 Screening
Molecular shape of SF4, CF4 and XeF4 are
IIT-JEE 2000 Screening
The geometry of H2S and its dipole moment are
IIT-JEE 1999
The correct order of increasing C - O bond length of CO, $$CO_3^{2-}$$, CO2 is
IIT-JEE 1999
Read the following Assertion and Reason and answer as per the options given below Assetion: LiCl is predominantly a cov...
IIT-JEE 1998
The geometry and the type of hybrid orbital present about the central atom in BF3 is
IIT-JEE 1998
The critical temperature of water is higher than that of O2 because the H2O molecule has
IIT-JEE 1997
Which contains both polar and non-polar bonds?
IIT-JEE 1997
Which one of the following compounds has sp2 hybridization?
IIT-JEE 1997
The number and type of bonds between two carbon atoms in CaC2 are:
IIT-JEE 1996
Among the following species, identity the isostructural pairs NF3, $$NO_3^-$$, BF3, H3O+ , HN3...
IIT-JEE 1996
Number of paired electrons in O2 molecules is
IIT-JEE 1995 Screening
Which one is most ionic
IIT-JEE 1995 Screening
Pick out the isoelectronic structures from the following I. $$CH_3^+$$ II. $$H_3O^+$$ III. $$NH_3$$ IV. $$CH_3^-$$...
IIT-JEE 1993
The type of hybrid orbitals used by the chlorine atom in $$ClO_2^-$$ is
IIT-JEE 1992
The cyanide ion, CN- and N2 are isoelectronic, But in contrast to CN-, N2 is chemically inert, because of...
IIT-JEE 1992
The maximum number of hydrogen bonds a water molecule can form is
IIT-JEE 1992
Which of the following is paramagnetic?
IIT-JEE 1989
The compound in which $$\mathop C\limits^* $$ uses its sp3 hybrid orbitals for bond formation is
IIT-JEE 1989
The molecule which has pyramidal shape is
IIT-JEE 1989
The molecule which has zero dipole moment is:
IIT-JEE 1989
The species in which the central atom uses sp2 hybrid orbitals in its bonding is
IIT-JEE 1988
The molecule that has linear structure is
IIT-JEE 1988
Hydrogen bond is maximum in
IIT-JEE 1987
The hybridisation of sulphur in sulphur dioxide is
IIT-JEE 1986
The hydrogen bond is strongest in
IIT-JEE 1986
The bond between two identical non-metal atoms has a pair of electrons
IIT-JEE 1986
The molecule having one unpaired electron is
IIT-JEE 1985
On hybridization of one s and one p orbitals we get:
IIT-JEE 1984
Which one among the following does not have the hydrogen bond?
IIT-JEE 1983
The types of bonds present in CuSO4.5H2O are only
IIT-JEE 1983
Carbon tetrachloride has no net dipole moment because of
IIT-JEE 1983
The compound with no dipole moment is
IIT-JEE 1982
Among the following, the molecule that is linear is
IIT-JEE 1982
The ion that is isoelectronic with CO is
IIT-JEE 1982
If a molecule MX3 has zero dipole moment, the sigma bonding orbitals used by M (atomic number < 21) are
IIT-JEE 1981
Which of the following is soluble in water?
IIT-JEE 1980
The total number of electrons that take part in forming the bond in N2 is
IIT-JEE 1980
Which of the following compounds are covalent?
IIT-JEE 1980
Element X is strongly electropositive and element Y is strongly electronegative. Both are univalent. The compound formed...
IIT-JEE 1980
The octet rule is not valid for the molecule
IIT-JEE 1979
The compound which contains both ionic and covalent bonds is
IIT-JEE 1979

Subjective

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Draw the structure of XeF4 and OSF4 according to VSEPR theory clearly indicating the state of hybridisation of the centr...
IIT-JEE 2004
Arrange the following : In the decreasing order of the O - O bond length present in them O2, KO2 and O2[AsF4]...
IIT-JEE 2004
Using VSEPR Theory draw the shape of PCl5 and BrF5
IIT-JEE 2003
Write down the M.O. electron distribution of O2. Specify its bond order and magnetic property.
IIT-JEE 2000
Interpret the non-linear shape of H2S molecule and non-planar shape of PCl3 using valence shell electron pair repulsion ...
IIT-JEE 1998
A compound of vanadium has a magnetic moment of 1.73 BM. Work out the electronic configuration of the vanadium ion in th...
IIT-JEE 1997
Using the VSEPR theory, identify the type of hybridization and draw the structure of OF2. What are the oxidation states ...
IIT-JEE 1994
The dipole moment of KCl is 3.336 $$\times$$ 10-29 Coulomb meters which indicates that it is a highly polar molecule. Th...
IIT-JEE 1993
Arrange the following : Increasing strength of hydrogen bonding (X-H-X): O, S, F, Cl, N
IIT-JEE 1991
Arrange the following : N2, O2, F2, Cl2 in increasing order of bond dissociation energy...
IIT-JEE 1988
Write the lewis dot structure of the following: O3, COCl2
IIT-JEE 1986
How many sigma bonds and how many pi-bonds are present in a benzene molecule?
IIT-JEE 1985

Fill in the Blanks

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When N2, the N-N bond distance _____ and when O2 goes to $$O_2^+$$ the O-O bond distance ___.
IIT-JEE 1996
The two types of bond present in B2H6 are covalent and _______.
IIT-JEE 1994
The shape of [CH3]+ is _____.
IIT-JEE 1990
____ hybrid orbitals of nitrogen atom are involved in the formation of ammonium ion.
IIT-JEE 1982
The angle between two convalent bonds is maximum in ________. (CH4, H2O, CO2)
IIT-JEE 1981

True or False

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The dipole moment of CH3F is greater than of CH3Cl
IIT-JEE 1993
The presence of polar bonds in a poly-atomic molecule suggests that the molecule has non-zero dipole moment.
IIT-JEE 1990
In benzene, carbon uses all the three p-orbitals for hybridisation.
IIT-JEE 1987
sp2 hybrid orbitals have equal s and p character.
IIT-JEE 1987
SnCl2 is a non-linear molecule
IIT-JEE 1985
All molecules with polar bonds have dipole moment.
IIT-JEE 1985
Linear overlap of two atomic p-orbitals leads to a sigma bond.
IIT-JEE 1983

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