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JEE Main

Chemical Bonding & Molecular Structure

Chemistry

Previous Years Questions

Numerical

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Consider, $$\mathrm{PF}_{5}, \mathrm{BrF}_{5}, \mathrm{PCl}_{3}, \mathrm{SF}_{6},\left[\mathrm{ICl}_{4}\right]^{-}, \mat...
JEE Main 2022 (Online) 29th July Evening Shift
The number of interhalogens from the following having square pyramidal structure is : $$\mathrm{ClF}_{3}, \mathrm{IF}_{7...
JEE Main 2022 (Online) 28th July Morning Shift
The number of paramagnetic species among the following is ___________. $$\mathrm{B}_{2}, \mathrm{Li}_{2}, \mathrm{C}_{2}...
JEE Main 2022 (Online) 28th July Morning Shift
The number of molecule(s) or ion(s) from the following having non-planar structure is ____________. $$\mathrm{NO}_{3}^{-...
JEE Main 2022 (Online) 27th July Evening Shift
According to MO theory, number of species/ions from the following having identical bond order is ________. $$\mathrm{CN}...
JEE Main 2022 (Online) 27th July Morning Shift
Amongst the following, the number of oxide(s) which are paramagnetic in nature is $$\mathrm{Na}_{2} \mathrm{O}, \mathrm{...
JEE Main 2022 (Online) 27th July Morning Shift
The spin-only magnetic moment value of the compound with strongest oxidizing ability among $$\mathrm{MnF}_{4}, \mathrm{M...
JEE Main 2022 (Online) 26th July Evening Shift
The sum of number of lone pairs of electrons present on the central atoms of XeO3, XeOF4 and XeF6, is ______________...
JEE Main 2022 (Online) 25th July Evening Shift
Among the following species $$\mathrm{N}_{2}, \mathrm{~N}_{2}^{+}, \mathrm{N}_{2}^{-}, \mathrm{N}_{2}^{2-}, \mathrm{O}_{...
JEE Main 2022 (Online) 25th July Morning Shift
Amongst the following, the number of molecule/(s) having net resultant dipole moment is ____________. NF3, BF3, BeF2, CH...
JEE Main 2022 (Online) 30th June Morning Shift
Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is ____________....
JEE Main 2022 (Online) 25th June Evening Shift
Amongst SF4, XeF4, CF4 and H2O, the number of species with two lone pairs of electrons is _____________....
JEE Main 2022 (Online) 26th June Evening Shift
The hybridization of P exhibited in PF5 is spxdy. The value of y is __________.
JEE Main 2022 (Online) 28th June Morning Shift
The spin-only magnetic moment value of $$B_2^ + $$ species is _____________ $$\times$$ 10$$-$$2 BM. (Nearest integer) [G...
JEE Main 2021 (Online) 1st September Evening Shift
According to molecular orbital theory, the number of unpaired electron(s) in $$O_2^{2 - }$$ is :
JEE Main 2021 (Online) 31st August Evening Shift
The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is ____________....
JEE Main 2021 (Online) 31st August Morning Shift
The number of species having non-pyramidal shape among the following is ___________.(A) SO3(B) NO$$_3^ - $$(C) PCl3(D) C...
JEE Main 2021 (Online) 27th August Evening Shift
AB3 is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is __________. (Integer answer)...
JEE Main 2021 (Online) 26th August Morning Shift
The total number of electrons in all bonding molecular orbitals of $$O_2^{2 - }$$ is ______________.(Round off to the ne...
JEE Main 2021 (Online) 27th July Evening Shift
The difference between bond orders of CO and NO$$^ \oplus $$ is $${x \over 2}$$ where x = _____________. (Round off to t...
JEE Main 2021 (Online) 27th July Morning Shift
The number of lone pairs of electrons on the central I atom in I$$_3^ - $$ is ____________.
JEE Main 2021 (Online) 20th July Morning Shift
The number of species below that have two lone pairs of electrons in their central atom is _________. (Round off to the ...
JEE Main 2021 (Online) 18th March Evening Shift
AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital t...
JEE Main 2021 (Online) 18th March Morning Shift
Among the following, the number of halide(s) which is/are inert to hydrolysis is _________.(A) BF3(B) SiCl4(C) PCl5(D) S...
JEE Main 2021 (Online) 25th February Morning Slot
The number of Cl = O bonds in perchloric acid is, "________".
JEE Main 2020 (Online) 6th September Morning Slot
The sum of the total number of bonds between chromium and oxygen atoms in chromate and dichromate ions is ____________.
JEE Main 2020 (Online) 9th January Evening Slot
Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate ...
JEE Main 2020 (Online) 7th January Morning Slot

MCQ (Single Correct Answer)

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Number of lone pairs of electrons in the central atom of $$\mathrm{SCl}_{2}, \mathrm{O}_{3}, \mathrm{ClF}_{3}$$ and $$\m...
JEE Main 2022 (Online) 29th July Morning Shift
Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?
JEE Main 2022 (Online) 29th July Morning Shift
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style...
JEE Main 2022 (Online) 27th July Evening Shift
The total number of $$\mathrm{Mn}=\mathrm{O}$$ bonds in $$\mathrm{Mn}_{2} \mathrm{O}_{7}$$ is __________.
JEE Main 2022 (Online) 27th July Morning Shift
Given below are two statements. Statement I: $$\mathrm{O}_{2}, \mathrm{Cu}^{2+}$$, and $$\mathrm{Fe}^{3+}$$ are weakly a...
JEE Main 2022 (Online) 27th July Morning Shift
Arrange the following in increasing order of their covalent character. A. $$\mathrm{CaF}_{2}$$ B. $$\mathrm{CaCl}_{2}$$ ...
JEE Main 2022 (Online) 26th July Evening Shift
Match List-I with List-II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:so...
JEE Main 2022 (Online) 26th July Morning Shift
Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:sol...
JEE Main 2022 (Online) 25th July Evening Shift
Identify the correct statement for B2H6 from those given below : (A) In B2H6, all B-H bonds are equivalent. (B) In B2H6,...
JEE Main 2022 (Online) 24th June Morning Shift
The correct order of bond orders of $${C_2}^{2 - }$$, $${N_2}^{2 - }$$ and $${O_2}^{2 - }$$ is, respectively
JEE Main 2022 (Online) 24th June Evening Shift
Number of electron deficient molecules among the following PH3, B2H6, CCl4, NH3, LiH and BCl3 is...
JEE Main 2022 (Online) 25th June Morning Shift
Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an e...
JEE Main 2022 (Online) 25th June Morning Shift
Consider the ions/molecule O$$_2^ + $$, O2, O$$_2^ - $$, O$$_2^ {2-} $$ For increasing bond order the correct option is ...
JEE Main 2022 (Online) 26th June Morning Shift
Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List-II and select ...
JEE Main 2022 (Online) 27th June Morning Shift
The correct order of increasing intermolecular hydrogen bond strength is
JEE Main 2022 (Online) 27th June Evening Shift
Identify the incorrect statement for PCl5 from the following.
JEE Main 2022 (Online) 27th June Evening Shift
In the structure of SF4, the lone pair of electrons on S is in.
JEE Main 2022 (Online) 28th June Evening Shift
Number of lone pair(s) of electrons on central atom and the shape BrF3 molecule respectively, are
JEE Main 2022 (Online) 29th June Evening Shift
Consider the species CH4, NH$$_4^ + $$ and BH$$_4^ - $$. Choose the correct option with respect to the these species....
JEE Main 2022 (Online) 29th June Evening Shift
Number of paramagnetic oxides among the following given oxides is ____________.Li2O, CaO, Na2O2, KO2, MgO and K2O...
JEE Main 2021 (Online) 1st September Evening Shift
Match items of List-I with those of List-II : List - I(Property) List - II(Example) (a...
JEE Main 2021 (Online) 27th August Morning Shift
Match List - I with List - II :Choose the most appropriate answer from the options given below :...
JEE Main 2021 (Online) 27th August Morning Shift
The bond order and magnetic behaviour of $$O_2^ - $$ ion are respectively :
JEE Main 2021 (Online) 26th August Evening Shift
Identify the species having one $$\pi$$-bond and maximum number of canonical forms from the following :
JEE Main 2021 (Online) 25th July Evening Shift
In the following the correct bond order sequence is :
JEE Main 2021 (Online) 25th July Evening Shift
Match List-I with List-II : List-I(Species) List-II(Hybrid Orbitals) (a) $$S{F_4}$...
JEE Main 2021 (Online) 22th July Evening Shift
The hybridisations of the atomic orbitals of nitrogen in NO$$_2^ - $$, NO$$_2^ + $$ and NH$$_4^ + $$ respectively are.
JEE Main 2021 (Online) 20th July Evening Shift
The set in which compounds have different nature is :
JEE Main 2021 (Online) 20th July Morning Shift
The oxide that shows magnetic property is :
JEE Main 2021 (Online) 18th March Evening Shift
Amongst the following, the linear species is :
JEE Main 2021 (Online) 17th March Evening Shift
A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is...
JEE Main 2021 (Online) 17th March Morning Shift
Given below are two statements : one is labeled as Assertion A and the other is labelled as Reason R :Assertion A : The ...
JEE Main 2021 (Online) 16th March Morning Shift
Match List - I with List - II. List - I (Molecule) List - II (Bond order) (a) $$N{...
JEE Main 2021 (Online) 26th February Evening Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.Assertion A : Dipo...
JEE Main 2021 (Online) 26th February Morning Shift
Which among the following species has unequal bond lengths?
JEE Main 2021 (Online) 25th February Evening Shift
According to molecular orbital theory, the species among the following that does not exist is :
JEE Main 2021 (Online) 25th February Morning Slot
The correct shape and $$I - I - I$$ bond angles respectively in $$I_3^ - $$ ion are :
JEE Main 2021 (Online) 24th February Evening Slot
The correct set from the following in which both pairs are in correct order of melting point is :
JEE Main 2021 (Online) 24th February Evening Slot
Which of the following are isostructural pairs ? A. $$SO_4^{2 - }$$ and $$CrO_4^{2 - }$$ B. SiCl4, and TiCl4 C. NH3 and ...
JEE Main 2021 (Online) 24th February Morning Slot
The compound that has the largest H–M–H bond angle (M = N, O, S, C) is :
JEE Main 2020 (Online) 5th September Evening Slot
The potential energy curve for the H2 molecule as a function of internuclear distance is :
JEE Main 2020 (Online) 5th September Morning Slot
The structure of PCl5 in the solid state is :
JEE Main 2020 (Online) 5th September Morning Slot
The reaction in which the hybridisation of the underlined atom is affected is :
JEE Main 2020 (Online) 4th September Evening Slot
The intermolecular potential energy for the molecules A, B, C and D given below suggests that : ...
JEE Main 2020 (Online) 4th September Morning Slot
Consider the following molecules and statements related to them : (a) (B) is more likely to be crystalline than (A) (b)...
JEE Main 2020 (Online) 3rd September Evening Slot
The incorrect statement is :
JEE Main 2020 (Online) 3rd September Evening Slot
Of the species, NO, NO+, NO2+ and NO- , the one with minimum bond strength is :
JEE Main 2020 (Online) 3rd September Morning Slot
The shape / structure of [XeF5]– and XeO3F2, respectively, are
JEE Main 2020 (Online) 2nd September Evening Slot
The molecular geometry of SF6 is octahedral. What is the geometry of SF4 (including lone pair(s) of electrons, if any)?...
JEE Main 2020 (Online) 2nd September Evening Slot
Match the type of interaction in column A with the distance dependence of their interaction energy in column B .tg {bo...
JEE Main 2020 (Online) 2nd September Evening Slot
If AB4 molecule is a polar molecule, a possible geometry of AB4 is
JEE Main 2020 (Online) 2nd September Morning Slot
The number of sp2 hybrid orbitals in a molecule of benzene is :
JEE Main 2020 (Online) 9th January Evening Slot
If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :
JEE Main 2020 (Online) 9th January Morning Slot
Arrange the following bonds according to their average bond energies in descending order : C–Cl, C–Br, C–F, C–I
JEE Main 2020 (Online) 8th January Evening Slot
The number of bonds between sulphur and oxygen atoms in S2O82- and the number of bonds between sulphur and sulphur atoms...
JEE Main 2020 (Online) 8th January Morning Slot
The bond order and the magnetic characteristics of CN- are :
JEE Main 2020 (Online) 7th January Evening Slot
The dipole of CCl4, CHCl3 and CH4 are in the order :
JEE Main 2020 (Online) 7th January Morning Slot
The relative strength of interionic/intermolecular forces in decreasing order is :
JEE Main 2020 (Online) 7th January Morning Slot
The correct statement among the following is :
JEE Main 2019 (Online) 12th April Morning Slot
The oxoacid of sulphur that does not contain bond between sulphur atoms is
JEE Main 2019 (Online) 10th April Morning Slot
During the change of O2 to O2- , the incoming electron goes to the orbital :
JEE Main 2019 (Online) 10th April Morning Slot
HF has highest boiling point among hydrogen halides, because it has :
JEE Main 2019 (Online) 9th April Evening Slot
The correct statements among I to III are : (I) Valence bond theory cannot explain the color exhibited by transition met...
JEE Main 2019 (Online) 9th April Evening Slot
The structures of beryllium chloride in the solid state and vapour, phase, respectively,are :
JEE Main 2019 (Online) 9th April Evening Slot
Among the following species, the diamagnetic molecule is
JEE Main 2019 (Online) 9th April Evening Slot
Among the following, the molecule expected to be stabilized by anion formation is : C2, O2, NO, F2...
JEE Main 2019 (Online) 9th April Morning Slot
The correct statement about ICl5 and $$ICl_4^-$$ is
JEE Main 2019 (Online) 8th April Evening Slot
Among the following molecules / ions, $$C_2^{2 - },N_2^{2 - },O_2^{2 - },{O_2}$$ which one is diamagnetic and has the sh...
JEE Main 2019 (Online) 8th April Evening Slot
The covalent alkaline earth metal halide (X = Cl, Br, I) is :
JEE Main 2019 (Online) 8th April Evening Slot
The ion that has sp3d2 hybridization for the central atom, is :
JEE Main 2019 (Online) 8th April Evening Slot
The element that shows greater ability to form p$$\pi $$-p$$\pi $$ multiple bonds, is -
JEE Main 2019 (Online) 12th January Evening Slot
The number of 2-centre-2-electron and 3-centre -2-electron bonds in B2H6, respectively, are :
JEE Main 2019 (Online) 10th January Evening Slot
The pair that contains two P – H bonds in each of the oxoacids is
JEE Main 2019 (Online) 10th January Evening Slot
The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:
JEE Main 2019 (Online) 10th January Morning Slot
Two pi and half sigma bonds are present in :
JEE Main 2019 (Online) 10th January Morning Slot
In which of the following process, the bond order has increased and paramagnetic character has charged to diamagnetic ?
JEE Main 2019 (Online) 9th January Evening Slot
According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2$$-$$ ? ...
JEE Main 2019 (Online) 9th January Morning Slot
Which of the following conversions involves change in both shape and hybridisation ?
JEE Main 2018 (Online) 16th April Morning Slot
The incorrect geometry is represented by :
JEE Main 2018 (Online) 16th April Morning Slot
Which of the following best describes the diagram below of a molecular orbital ? ...
JEE Main 2018 (Online) 15th April Evening Slot
The number of P $$-$$ O bonds in P4O6 is :
JEE Main 2018 (Online) 15th April Evening Slot
In hydrogen azide (above) the bond orders of bond (I) and (II) are :...
JEE Main 2018 (Online) 15th April Morning Slot
The decreasing order of bond angles in BF3, NH3, PF3 and I3- is :
JEE Main 2018 (Online) 15th April Morning Slot
Identify the pair in which the geometry of the species is $$T$$-shape and square - pyraidal, respectively :
JEE Main 2018 (Online) 15th April Morning Slot
In the molecular orbital diagram for the molecular ion, N2+, the number of electrons in the $$\sigma $$2pz molecular orb...
JEE Main 2018 (Online) 15th April Morning Slot
Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2SO4 ...
JEE Main 2018 (Offline)
Total number of lone pair of electrons in $${\rm I}_3^ - $$ ion is
JEE Main 2018 (Offline)
According to molecular orbital theory, which of the following will not be a viable molecule?
JEE Main 2018 (Offline)
The group having triangular planar structures is :
JEE Main 2017 (Online) 9th April Morning Slot
sp3d2 hybridization is not displayed by :
JEE Main 2017 (Online) 8th April Morning Slot
Which of the following is paramagnetic ?
JEE Main 2017 (Online) 8th April Morning Slot
Which of the following species is not paramagnetic?
JEE Main 2017 (Offline)
The species in which the $\mathrm{N}$ atom is in a state of $s p$ hybridization is :
JEE Main 2016 (Offline)
The bond angle H - X - H is the greatest in the compound :
JEE Main 2016 (Online) 10th April Morning Slot
The group of molecules having identical shape is :
JEE Main 2016 (Online) 9th April Morning Slot
The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is:
JEE Main 2015 (Offline)
Stability of the species Li2, $$Li_2^−$$ and $$Li_2^+$$ increases in the order of:
JEE Main 2013 (Offline)
In which of the following pairs of molecules/ions, both the species are not likely to exist?
JEE Main 2013 (Offline)
In which of the following pairs the two species are not isostructural ?
AIEEE 2012
Ortho–Nitrophenol is less soluble in water than p– and m– Nitrophenols because :
AIEEE 2012
The structure of IF7 is :
AIEEE 2011
The hybridization of orbitals of N atom in $$NO_3^-$$, $$NO_2^+$$ and $$NH_4^+$$ are respectively :
AIEEE 2011
Among the following the maximum covalent character is shown by the compound :
AIEEE 2011
Using MO theory, predict which of the following species has the shortest bond length?
AIEEE 2009
The bond dissociation energy of B - F in BF3 is 646 jJ mol-1 whereas that of C - F in CF4 is 515 kj mol-1. The correct r...
AIEEE 2008
Which of the following pair of species have the same bond order?
AIEEE 2008
Which of the following hydrogen bonds is the strongest?
AIEEE 2007
In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
AIEEE 2007
Which of the following species exhibits the diamagnetic behaviour?
AIEEE 2007
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the i...
AIEEE 2007
The decreasing values of bond angles from NH3 (106o) to SbH3 (91o ) down group-15 of the periodic table is due to ...
AIEEE 2006
In which of the following molecules/ions are all the bonds not equal?
AIEEE 2006
Which of the following molecules/ions does not contain unpaired electrons?
AIEEE 2006
Lattice energy of an ionic compounds depends upon
AIEEE 2005
The maximum number of 90° angles between bond pair of electrons is observed in
AIEEE 2004
Which one of the following has the regular tetrahedral structure? (Atomic nos : B = 5, S = 16, Ni = 28, Xe = 54)
AIEEE 2004
The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively
AIEEE 2004
The bond order in NO is 2.5 while that in NO+ is 3. Which of the following statements is true for these two species? ...
AIEEE 2004
The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is ...
AIEEE 2004
The pair of species having identical shapes for molecules of both species is
AIEEE 2003
Which one of the following compounds has the smallest bond angle in its molecule?
AIEEE 2003
Which one of the following pairs of molecules will have permanent dipole moments for both members
AIEEE 2003
An ethar is more volatile than an alcohol having the same molecular formula. This is due to
AIEEE 2003
A square planar complex is formed by hybridisation of which atomic orbitals ?
AIEEE 2002
In which of the following species is the underlined carbon having sp3 hybridisation?
AIEEE 2002
Which of the following are arranged in an increasing order of their bond strengths?
AIEEE 2002
Hybridisation of underline atom changes in
AIEEE 2002
In which of the following species the interatomic bond angle is 109o28' ?
AIEEE 2002

MCQ (More than One Correct Answer)

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Which one of the following molecules is expected to exhibit diamagnetic behaviour?
JEE Main 2013 (Offline)

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