Chemical Bonding & Molecular Structure · Chemistry · JEE Main

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MCQ (Single Correct Answer)

JEE Main 2024 (Online) 9th April Evening Shift
The correct increasing order for bond angles among $$\mathrm{BF}_3, \mathrm{PF}_3$$ and $$\mathrm{ClF}_3$$ is :
JEE Main 2024 (Online) 9th April Morning Shift
In which one of the following pairs the central atoms exhibit $$\mathrm{sp}^2$$ hybridization ?
JEE Main 2024 (Online) 8th April Evening Shift
The shape of carbocation is :
JEE Main 2024 (Online) 8th April Evening Shift
When $$\psi_{\mathrm{A}}$$ and $$\psi_{\mathrm{B}}$$ are the wave functions of atomic orbitals, then $$\sigma^*$$ is represented by :
JEE Main 2024 (Online) 8th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 6th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 6th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2024 (Online) 5th April Evening Shift
Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2024 (Online) 5th April Evening Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : $$\mathrm{NH}_3$$ and $$\ma...
JEE Main 2024 (Online) 5th April Morning Shift
Number of $$\sigma$$ and $$\pi$$ bonds present in ethylene molecule is respectively :
JEE Main 2024 (Online) 4th April Evening Shift
The correct statement/s about Hydrogen bonding is/are A. Hydrogen bonding exists when H is covalently bonded to the highly electro negative atom. B. I...
JEE Main 2024 (Online) 4th April Evening Shift
The number of species from the following that have pyramidal geometry around the central atom is _________ $$\mathrm{S}_2 \mathrm{O}_3^{2-}, \mathrm{S...
JEE Main 2024 (Online) 4th April Morning Shift
Number of molecules/ions from the following in which the central atom is involved in $$\mathrm{sp}^3$$ hybridization is ________. $$\mathrm{NO}_3^{-},...
JEE Main 2024 (Online) 4th April Morning Shift
Which one of the following molecules has maximum dipole moment?
JEE Main 2024 (Online) 1st February Evening Shift
Given below are two statements : Statement (I) : A $\pi$ bonding MO has lower electron density above and below the inter-nuclear axis. Statement (II)...
JEE Main 2024 (Online) 1st February Evening Shift
Select the compound from the following that will show intramolecular hydrogen bonding.
JEE Main 2024 (Online) 1st February Morning Shift
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): $\mathrm{PH}_3$ has lower boi...
JEE Main 2024 (Online) 1st February Morning Shift
Arrange the bonds in order of increasing ionic character in the molecules. $\mathrm{LiF}$, $\mathrm{K}_2 \mathrm{O}, \mathrm{N}_2, \mathrm{SO}_2$ and ...
JEE Main 2024 (Online) 31st January Evening Shift
Which of the following is least ionic?
JEE Main 2024 (Online) 31st January Morning Shift
The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. ha...
JEE Main 2024 (Online) 30th January Evening Shift
Given below are two statements: Statement - I: Since Fluorine is more electronegative than nitrogen, the net dipole moment of $$\mathrm{NF}_3$$ is gre...
JEE Main 2024 (Online) 30th January Evening Shift
The molecule / ion with square pyramidal shape is
JEE Main 2024 (Online) 30th January Morning Shift
Aluminium chloride in acidified aqueous solution forms an ion having geometry
JEE Main 2024 (Online) 30th January Morning Shift
Match List I with List II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2024 (Online) 30th January Morning Shift
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : There is a considerable inc...
JEE Main 2024 (Online) 29th January Morning Shift
The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is
JEE Main 2024 (Online) 27th January Morning Shift
Choose the polar molecule from the following:
JEE Main 2023 (Online) 15th April Morning Shift
The number of $\mathrm{P}-\mathrm{O}-\mathrm{P}$ bonds in $\mathrm{H}_{4} \mathrm{P}_{2} \mathrm{O}_{7},\left(\mathrm{HPO}_{3}\right)_{3}$ and $\mathr...
JEE Main 2023 (Online) 15th April Morning Shift
Consider the following statements: (A) NF3 molecule has a trigonal planar structure. (B) Bond length of $\mathrm{N}_{2}$ is shorter than $\mathrm{O}...
JEE Main 2023 (Online) 13th April Evening Shift
Given below are two statements : Statement I : $$\mathrm{SO}_{2}$$ and $$\mathrm{H}_{2} \mathrm{O}$$ both possess V-shaped structure. Statement II : T...
JEE Main 2023 (Online) 13th April Morning Shift
In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one ?
JEE Main 2023 (Online) 13th April Morning Shift
$$\mathrm{ClF}_{5}$$ at room temperature is a:
JEE Main 2023 (Online) 12th April Morning Shift
The bond order and magnetic property of acetylide ion are same as that of
JEE Main 2023 (Online) 11th April Morning Shift
Match List - I with List - II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-f...
JEE Main 2023 (Online) 10th April Morning Shift
The compound which does not exist is
JEE Main 2023 (Online) 6th April Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 1st February Evening Shift
$$\mathrm{O}-\mathrm{O}$$ bond length in $$\mathrm{H}_{2} \mathrm{O}_{2}$$ is $$\underline{\mathrm{X}}$$ than the $$\mathrm{O}-\mathrm{O}$$ bond lengt...
JEE Main 2023 (Online) 31st January Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 30th January Morning Shift
For $$\mathrm{OF}_{2}$$ molecule consider the following : A. Number of lone pairs on oxygen is 2 . B. FOF angle is less than $$104.5^{\circ}$$. C. Oxi...
JEE Main 2023 (Online) 30th January Morning Shift
Match List I with List II .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family...
JEE Main 2023 (Online) 29th January Evening Shift
According to MO theory the bond orders for $$\mathrm{O}$$$$_2^{2 - }$$, $$\mathrm{CO}$$ and $$\mathrm{NO^+}$$ respectively, are
JEE Main 2023 (Online) 29th January Morning Shift
The magnetic behaviour of $$\mathrm{Li_2O,Na_2O_2}$$ and $$\mathrm{KO_2}$$, respectively, are :
JEE Main 2023 (Online) 29th January Morning Shift
The bond dissociation energy is highest for
JEE Main 2023 (Online) 25th January Evening Shift
Statement I : Dipole moment is a vector quantity and by convention it is depicted by a small arrow with tail on the negative centre and head pointing ...
JEE Main 2023 (Online) 24th January Evening Shift
What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : $$\mathrm{{N_2};N_2^ + ;{O_2};O_2^ + }...
JEE Main 2023 (Online) 24th January Morning Shift
Decreasing order of the hydrogen bonding in following forms of water is correctly represented by A. Liquid water B. Ice C. Impure water Choose the cor...
JEE Main 2023 (Online) 24th January Morning Shift
Order of Covalent bond; $$\mathrm{A.~KF > KI ; LiF > KF}$$ $$\mathrm{B.~KF KF}$$ $$\mathrm{C.~SnCl_4 > SnCl_2 ; CuCl > NaCl}$$ $$\mathrm{D.~LiF > KF ...
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
Number of lone pairs of electrons in the central atom of $$\mathrm{SCl}_{2}, \mathrm{O}_{3}, \mathrm{ClF}_{3}$$ and $$\mathrm{SF}_{6}$$, respectively,...
JEE Main 2022 (Online) 27th July Evening Shift
Match List - I with List - II. .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-f...
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 attracted by magnetic field and...
JEE Main 2022 (Online) 26th July Evening Shift
Arrange the following in increasing order of their covalent character. A. $$\mathrm{CaF}_{2}$$ B. $$\mathrm{CaCl}_{2}$$ C. $$\mathrm{CaBr}_{2}$$ D. $$...
JEE Main 2022 (Online) 26th July Morning Shift
Match List-I with List-II : .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-fami...
JEE Main 2022 (Online) 25th July Evening Shift
Match List I with List II: .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-famil...
JEE Main 2022 (Online) 29th June Evening Shift
Consider the species CH4, NH$$_4^ + $$ and BH$$_4^ - $$. Choose the correct option with respect to the these species.
JEE Main 2022 (Online) 29th June Evening Shift
Number of lone pair(s) of electrons on central atom and the shape BrF3 molecule respectively, are
JEE Main 2022 (Online) 28th June Evening Shift
In the structure of SF4, the lone pair of electrons on S is in.
JEE Main 2022 (Online) 27th June Evening Shift
Identify the incorrect statement for PCl5 from the following.
JEE Main 2022 (Online) 27th June Evening Shift
The correct order of increasing intermolecular hydrogen bond strength is
JEE Main 2022 (Online) 27th June Morning Shift
Based upon VSEPR theory, match the shape (geometry) of the molecules in List-I with the molecules in List-II and select the most appropriate option. ...
JEE Main 2022 (Online) 26th June Morning Shift
Consider the ions/molecule O$$_2^ + $$, O2, O$$_2^ - $$, O$$_2^ {2-} $$ For increasing bond order the correct option is :...
JEE Main 2022 (Online) 25th June Morning Shift
Bonding in which of the following diatomic molecule(s) become(s) stronger, on the basis of MO Theory, by removal of an electron? (A) NO (B) N2 (C) O2 ...
JEE Main 2022 (Online) 25th June Morning Shift
Number of electron deficient molecules among the following PH3, B2H6, CCl4, NH3, LiH and BCl3 is...
JEE Main 2022 (Online) 24th June Evening Shift
The correct order of bond orders of $${C_2}^{2 - }$$, $${N_2}^{2 - }$$ and $${O_2}^{2 - }$$ is, respectively
JEE Main 2021 (Online) 1st September Evening Shift
Number of paramagnetic oxides among the following given oxides is ____________.Li2O, CaO, Na2O2, KO2, MgO and K2O...
JEE Main 2021 (Online) 27th August Morning Shift
Match List - I with List - II :Choose the most appropriate answer from the options given below :...
JEE Main 2021 (Online) 27th August Morning Shift
Match items of List-I with those of List-II : List - I(Property) List - II(Example) (a) Diamagnetism (i) ...
JEE Main 2021 (Online) 26th August Evening Shift
The bond order and magnetic behaviour of $$O_2^ - $$ ion are respectively :
JEE Main 2021 (Online) 25th July Evening Shift
In the following the correct bond order sequence is :
JEE Main 2021 (Online) 25th July Evening Shift
Identify the species having one $$\pi$$-bond and maximum number of canonical forms from the following :
JEE Main 2021 (Online) 22th July Evening Shift
Match List-I with List-II : List-I(Species) List-II(Hybrid Orbitals) (a) $$S{F_4}$$ (i) $$s{p^3}{d^2}$$ ...
JEE Main 2021 (Online) 20th July Evening Shift
The hybridisations of the atomic orbitals of nitrogen in NO$$_2^ - $$, NO$$_2^ + $$ and NH$$_4^ + $$ respectively are.
JEE Main 2021 (Online) 17th March Evening Shift
Amongst the following, the linear species is :
JEE Main 2021 (Online) 17th March Morning Shift
A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is :
JEE Main 2021 (Online) 16th March Morning Shift
Given below are two statements : one is labeled as Assertion A and the other is labelled as Reason R :Assertion A : The H$$-$$O$$-$$H bond angle in wa...
JEE Main 2021 (Online) 26th February Evening Shift
Match List - I with List - II. List - I (Molecule) List - II (Bond order) (a) $$N{e_2}$$ (i) 1 ...
JEE Main 2021 (Online) 26th February Morning Shift
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.Assertion A : Dipole-dipole interactions are the...
JEE Main 2021 (Online) 25th February Evening Shift
Which among the following species has unequal bond lengths?
JEE Main 2021 (Online) 25th February Morning Shift
According to molecular orbital theory, the species among the following that does not exist is :
JEE Main 2021 (Online) 24th February Evening Shift
The correct set from the following in which both pairs are in correct order of melting point is :
JEE Main 2021 (Online) 24th February Evening Shift
The correct shape and $$I - I - I$$ bond angles respectively in $$I_3^ - $$ ion are :
JEE Main 2021 (Online) 24th February Morning Shift
Which of the following are isostructural pairs ? A. $$SO_4^{2 - }$$ and $$CrO_4^{2 - }$$ B. SiCl4, and TiCl4 C. NH3 and NO3- D. BCl3 and BrCl3 ...
JEE Main 2020 (Online) 5th September Evening Slot
The compound that has the largest H–M–H bond angle (M = N, O, S, C) 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 potential energy curve for the H2 molecule as a function of internuclear distance is :
JEE Main 2020 (Online) 4th September Evening Slot
The reaction in which the hybridisation of the underlined atom is affected is :
JEE Main 2020 (Online) 4th September Morning Slot
The intermolecular potential energy for the molecules A, B, C and D given below suggests that : ...
JEE Main 2020 (Online) 3rd September Morning Slot
Of the species, NO, NO+, NO2+ and NO- , the one with minimum bond strength is :
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 {border-collapse:collapse;border-...
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
The shape / structure of [XeF5]– and XeO3F2, respectively, are
JEE Main 2020 (Online) 2nd September Morning Slot
If AB4 molecule is a polar molecule, a possible geometry of AB4 is
JEE Main 2020 (Online) 9th January Evening Slot
The number of sp2 hybrid orbitals in a molecule of benzene is :
JEE Main 2020 (Online) 9th January Morning Slot
If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :
JEE Main 2020 (Online) 8th January Evening 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) 7th January Evening Slot
The bond order and the magnetic characteristics of CN- are :
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 dipole of CCl4, CHCl3 and CH4 are in the order :
JEE Main 2019 (Online) 12th April Morning Slot
The correct statement among the following 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
The oxoacid of sulphur that does not contain bond between sulphur atoms is
JEE Main 2019 (Online) 9th April Evening Slot
Among the following species, the diamagnetic molecule is
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 metal complexes. (II) Valence bon...
JEE Main 2019 (Online) 9th April Evening Slot
HF has highest boiling point among hydrogen halides, because it has :
JEE Main 2019 (Online) 9th April Morning Slot
Among the following, the molecule expected to be stabilized by anion formation is : C2, O2, NO, F2
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 covalent alkaline earth metal halide (X = Cl, Br, I) 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}$$ which one is diamagnetic and has the shortest bond length?
JEE Main 2019 (Online) 8th April Evening Slot
The correct statement about ICl5 and $$ICl_4^-$$ is
JEE Main 2019 (Online) 10th January Evening Slot
The pair that contains two P – H bonds in each of the oxoacids is
JEE Main 2019 (Online) 10th January Morning Slot
Two pi and half sigma bonds are present in :
JEE Main 2019 (Online) 10th January Morning Slot
The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:
JEE Main 2019 (Online) 9th January Evening Slot
In which of the following process, the bond order has increased and paramagnetic character has charged to diamagnetic ?
JEE Main 2019 (Online) 9th January Morning Slot
According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2$$-$$ ?
JEE Main 2018 (Online) 16th April Morning Slot
The incorrect geometry is represented by :
JEE Main 2018 (Online) 16th April Morning Slot
Which of the following conversions involves change in both shape and hybridisation ?
JEE Main 2018 (Offline)
According to molecular orbital theory, which of the following will not be a viable molecule?
JEE Main 2018 (Offline)
Total number of lone pair of electrons in $${\rm I}_3^ - $$ ion is
JEE Main 2018 (Offline)
Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2SO4 ...
JEE Main 2018 (Online) 15th April Evening Slot
Which of the following best describes the diagram below of a molecular orbital ? ...
JEE Main 2018 (Online) 15th April Morning Slot
In the molecular orbital diagram for the molecular ion, N2+, the number of electrons in the $$\sigma $$2pz molecular orbital is : ...
JEE Main 2018 (Online) 15th April Morning Slot
Identify the pair in which the geometry of the species is $$T$$-shape and square - pyraidal, respectively :
JEE Main 2018 (Online) 15th April Morning Slot
The decreasing order of bond angles in BF3, NH3, PF3 and I3- is :
JEE Main 2018 (Online) 15th April Morning Slot
In hydrogen azide (above) the bond orders of bond (I) and (II) are :...
JEE Main 2017 (Online) 9th April Morning Slot
The group having triangular planar structures is :
JEE Main 2017 (Online) 8th April Morning Slot
Which of the following is paramagnetic ?
JEE Main 2017 (Online) 8th April Morning Slot
sp3d2 hybridization is not displayed by :
JEE Main 2017 (Offline)
Which of the following species is not paramagnetic?
JEE Main 2016 (Online) 10th April Morning Slot
The bond angle H - X - H is the greatest in the compound :
JEE Main 2016 (Online) 9th April Morning Slot
The group of molecules having identical shape is :
JEE Main 2016 (Offline)
The species in which the $\mathrm{N}$ atom is in a state of $s p$ hybridization is :
JEE Main 2015 (Offline)
The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is:
JEE Main 2013 (Offline)
In which of the following pairs of molecules/ions, both the species are not likely to exist?
JEE Main 2013 (Offline)
Stability of the species Li2, $$Li_2^−$$ and $$Li_2^+$$ increases in the order of:
AIEEE 2012
In which of the following pairs the two species are not isostructural ?
AIEEE 2011
Among the following the maximum covalent character is shown by the compound :
AIEEE 2011
The hybridization of orbitals of N atom in $$NO_3^-$$, $$NO_2^+$$ and $$NH_4^+$$ are respectively :
AIEEE 2011
The structure of IF7 is :
AIEEE 2009
Using MO theory, predict which of the following species has the shortest bond length?
AIEEE 2008
Which of the following pair of species have the same bond order?
AIEEE 2008
The bond dissociation energy of B - F in BF3 is 646 kJ mol-1 whereas that of C - F in CF4 is 515 kj mol-1. The correct reason for higher B - F bond di...
AIEEE 2007
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polariz...
AIEEE 2007
Which of the following species exhibits the diamagnetic behaviour?
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 hydrogen bonds is the strongest?
AIEEE 2006
Which of the following molecules/ions does not contain unpaired electrons?
AIEEE 2006
In which of the following molecules/ions are all the bonds not equal?
AIEEE 2006
The decreasing values of bond angles from NH3 (106o) to SbH3 (91o ) down group-15 of the periodic table is due to ...
AIEEE 2005
Lattice energy of an ionic compounds depends upon
AIEEE 2005
Which one of the following species is diamagnetic in nature?
AIEEE 2004
The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is
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 states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively
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 maximum number of 90° angles between bond pair of electrons is observed in
AIEEE 2003
Which one of the following pairs of molecules will have permanent dipole moments for both members
AIEEE 2003
Which one of the following compounds has the smallest bond angle in its molecule?
AIEEE 2003
The pair of species having identical shapes for molecules of both species is
AIEEE 2002
In which of the following species the interatomic bond angle is 109o28' ?
AIEEE 2002
Hybridisation of underline atom changes in
AIEEE 2002
Which of the following are arranged in an increasing order of their bond strengths?
AIEEE 2002
In which of the following species is the underlined carbon having sp3 hybridisation?
AIEEE 2002
Which of the following statements is true?
AIEEE 2002
A square planar complex is formed by hybridisation of which atomic orbitals ?

Numerical

JEE Main 2024 (Online) 9th April Evening Shift
Total number of electrons present in $$\left(\pi^*\right)$$ molecular orbitals of $$\mathrm{O}_2, \mathrm{O}_2^{+}$$ and $$\mathrm{O}_2^{-}$$ is _____...
JEE Main 2024 (Online) 9th April Morning Shift
The total number of species from the following in which one unpaired electron is present, is _______. $$\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, ...
JEE Main 2024 (Online) 8th April Evening Shift
Number of molecules having bond order 2 from the following molecules is _________. $$\mathrm{C}_2, \mathrm{O}_2, \mathrm{Be}_2, \mathrm{Li}_2, \mathrm...
JEE Main 2024 (Online) 8th April Morning Shift
Number of molecules from the following which are exceptions to octet rule is _________. $$\mathrm{CO}_2, \mathrm{NO}_2, \mathrm{H}_2 \mathrm{SO}_4, \m...
JEE Main 2024 (Online) 6th April Evening Shift
Consider the following reactions The number of protons that do not involve in hydrogen bonding in the product B is _________....
JEE Main 2024 (Online) 6th April Evening Shift
Total number of species from the following with central atom utilising $$\mathrm{sp}^2$$ hybrid orbitals for bonding is ________. $$\mathrm{NH}_3, \ma...
JEE Main 2024 (Online) 6th April Morning Shift
Number of molecules from the following which can exhibit hydrogen bonding is _________. (nearest integer) ...
JEE Main 2024 (Online) 5th April Evening Shift
Number of compounds from the following with zero dipole moment is _________. $$\mathrm{HF}, \mathrm{H}_2, \mathrm{H}_2 \mathrm{~S}, \mathrm{CO}_2, \ma...
JEE Main 2024 (Online) 5th April Morning Shift
In the lewis dot structure for $$\mathrm{NO}_2^{-}$$, total number of valence electrons around nitrogen is _________.
JEE Main 2024 (Online) 4th April Evening Shift
Number of compounds / species from the following with non-zero dipole moment is _________. $$\mathrm{BeCl}_2, \mathrm{BCl}_3, \mathrm{NF}_3, \mathrm{X...
JEE Main 2024 (Online) 4th April Morning Shift
Number of molecules/species from the following having one unpaired electron is ________. $$\mathrm{O}_2, \mathrm{O}_2^{-1}, \mathrm{NO}, \mathrm{CN}^{...
JEE Main 2024 (Online) 1st February Morning Shift
The number of molecules/ion/s having trigonal bipyramidal shape is _______. $\mathrm{PF}_5, \mathrm{BrF}_5, \mathrm{PCl}_5,\left[\mathrm{Pt} \mathrm{...
JEE Main 2024 (Online) 1st February Morning Shift
The lowest oxidation number of an atom in a compound $\mathrm{A}_2 \mathrm{B}$ is -2 . The number of electrons in its valence shell is _______.
JEE Main 2024 (Online) 31st January Evening Shift
A diatomic molecule has a dipole moment of $$1.2 \mathrm{~D}$$. If the bond distance is $$1 \mathrm{~A}^{\circ}$$, then fractional charge on each atom...
JEE Main 2024 (Online) 31st January Morning Shift
The number of species from the following in which the central atom uses $$\mathrm{sp}^3$$ hybrid orbitals in its bonding is __________. $$\mathrm{NH}_...
JEE Main 2024 (Online) 30th January Morning Shift
The total number of molecular orbitals formed from $$2 \mathrm{s}$$ and $$2 \mathrm{p}$$ atomic orbitals of a diatomic molecule is __________.
JEE Main 2024 (Online) 29th January Evening Shift
The total number of molecules with zero dipole moment among $$\mathrm{CH}_4, \mathrm{BF}_3, \mathrm{H}_2 \mathrm{O}, \mathrm{HF}, \mathrm{NH}_3, \math...
JEE Main 2024 (Online) 29th January Evening Shift
The total number of anti bonding molecular orbitals, formed from $$2 s$$ and $$2 p$$ atomic orbitals in a diatomic molecule is _______.
JEE Main 2024 (Online) 29th January Morning Shift
The number of species from the following which are paramagnetic and with bond order equal to one is _________. $$\mathrm{H}_2, \mathrm{He}_2^{+}, \mat...
JEE Main 2024 (Online) 29th January Morning Shift
Number of compounds with one lone pair of electrons on central atom amongst following is _________. $$\mathrm{O}_3, \mathrm{H}_2 \mathrm{O}, \mathrm{S...
JEE Main 2024 (Online) 27th January Evening Shift
The number of non-polar molecules from the following is _________. $$\mathrm{HF}, \mathrm{H}_2 \mathrm{O}, \mathrm{SO}_2, \mathrm{H}_2, \mathrm{CO}_2,...
JEE Main 2024 (Online) 27th January Morning Shift
Sum of bond order of CO and NO$$^+$$ is ________.
JEE Main 2023 (Online) 11th April Evening Shift
The maximum number of lone pairs of electrons on the central atom from the following species is ____________. $$\mathrm{ClO}_{3}{ }^{-}, \mathrm{XeF}_...
JEE Main 2023 (Online) 10th April Evening Shift
The number of molecules from the following which contain only two lone pair of electrons is ________ $$\mathrm{H}_{2} \mathrm{O}, \mathrm{N}_{2}, \mat...
JEE Main 2023 (Online) 10th April Morning Shift
The number of bent-shaped molecule/s from the following is __________ N$$_3^-$$, NO$$_2^-$$, I$$_3^-$$, O$$_3$$, SO$$_2$$
JEE Main 2023 (Online) 10th April Morning Shift
The sum of lone pairs present on the central atom of the interhalogen IF$$_5$$ and IF$$_7$$ is _________
JEE Main 2023 (Online) 8th April Evening Shift
The number of species from the following carrying a single lone pair on central atom Xenon is ___________. $$\mathrm{XeF}_{5}^{+}, \mathrm{XeO}_{3}, \...
JEE Main 2023 (Online) 8th April Morning Shift
The number of following factors which affect the percent covalent character of the ionic bond is _________ (A) Polarising power of cation (B) Extent o...
JEE Main 2023 (Online) 6th April Evening Shift
The number of species having a square planar shape from the following is __________. $$\mathrm{XeF}_{4}, \mathrm{SF}_{4}, \mathrm{SiF}_{4}, \mathrm{BF...
JEE Main 2023 (Online) 6th April Evening Shift
In an ice crystal, each water molecule is hydrogen bonded to ____________ neighbouring molecules.
JEE Main 2023 (Online) 6th April Morning Shift
The number of species from the following which have square pyramidal structure is _________ $$\mathrm{PF}_{5}, \mathrm{BrF}_{4}^{-}, \mathrm{IF}_{5}, ...
JEE Main 2023 (Online) 31st January Evening Shift
Amongst the following, the number of species having the linear shape is _________. $\mathrm{XeF}_{2}, \mathrm{I}_{3}^{+}, \mathrm{C}_{3} \mathrm{O}_{...
JEE Main 2023 (Online) 29th January Morning Shift
The number of molecules or ions from the following, which do not have odd number of electrons are _________. (A) NO$$_2$$ (B) ICl$$_4^ - $$ (C) BrF$$_...
JEE Main 2023 (Online) 25th January Morning Shift
The total number of lone pairs of electrons on oxygen atoms of ozone is __________.
JEE Main 2022 (Online) 29th July Evening Shift
Consider, $$\mathrm{PF}_{5}, \mathrm{BrF}_{5}, \mathrm{PCl}_{3}, \mathrm{SF}_{6},\left[\mathrm{ICl}_{4}\right]^{-}, \mathrm{ClF}_{3}$$ and $$\mathrm{I...
JEE Main 2022 (Online) 28th July Morning Shift
The number of paramagnetic species among the following is ___________. $$\mathrm{B}_{2}, \mathrm{Li}_{2}, \mathrm{C}_{2}, \mathrm{C}_{2}^{-}, \mathrm{...
JEE Main 2022 (Online) 28th July Morning Shift
The number of interhalogens from the following having square pyramidal structure is : $$\mathrm{ClF}_{3}, \mathrm{IF}_{7}, \mathrm{BrF}_{5}, \mathrm{B...
JEE Main 2022 (Online) 27th July Evening Shift
The number of molecule(s) or ion(s) from the following having non-planar structure is ____________. $$\mathrm{NO}_{3}^{-}, \mathrm{H}_{2} \mathrm{O}_{...
JEE Main 2022 (Online) 27th July Morning Shift
Amongst the following, the number of oxide(s) which are paramagnetic in nature is $$\mathrm{Na}_{2} \mathrm{O}, \mathrm{KO}_{2}, \mathrm{NO}_{2}, \mat...
JEE Main 2022 (Online) 27th July Morning Shift
According to MO theory, number of species/ions from the following having identical bond order is ________. $$\mathrm{CN}^{-}, \mathrm{NO}^{+}, \mathrm...
JEE Main 2022 (Online) 25th 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 Morning Shift
Among the following species $$\mathrm{N}_{2}, \mathrm{~N}_{2}^{+}, \mathrm{N}_{2}^{-}, \mathrm{N}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{+}, \mathr...
JEE Main 2022 (Online) 30th June Morning Shift
Amongst the following, the number of molecule/(s) having net resultant dipole moment is ____________. NF3, BF3, BeF2, CHCl3, H2S, SiF4, CCl4, PF5...
JEE Main 2022 (Online) 28th June Morning Shift
The hybridization of P exhibited in PF5 is spxdy. The value of y is __________.
JEE Main 2022 (Online) 26th June Evening Shift
Amongst SF4, XeF4, CF4 and H2O, the number of species with two lone pairs of electrons is _____________....
JEE Main 2022 (Online) 25th June Evening Shift
Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is ____________....
JEE Main 2021 (Online) 1st September Evening Shift
The spin-only magnetic moment value of $$B_2^ + $$ species is _____________ $$\times$$ 10$$-$$2 BM. (Nearest integer) [Given : $$\sqrt 3 $$ = 1.73]...
JEE Main 2021 (Online) 31st August Evening Shift
According to molecular orbital theory, the number of unpaired electron(s) in $$O_2^{2 - }$$ is :
JEE Main 2021 (Online) 31st August Morning Shift
The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is ____________.
JEE Main 2021 (Online) 27th August Evening Shift
The number of species having non-pyramidal shape among the following is ___________.(A) SO3(B) NO$$_3^ - $$(C) PCl3(D) CO$$_3^{2 - }$$...
JEE Main 2021 (Online) 26th August Morning Shift
AB3 is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is __________. (Integer answer)
JEE Main 2021 (Online) 27th July Evening Shift
The total number of electrons in all bonding molecular orbitals of $$O_2^{2 - }$$ is ______________.(Round off to the nearest integer)
JEE Main 2021 (Online) 27th July Morning Shift
The difference between bond orders of CO and NO$$^ \oplus $$ is $${x \over 2}$$ where x = _____________. (Round off to the Nearest Integer)
JEE Main 2021 (Online) 20th July Morning Shift
The number of lone pairs of electrons on the central I atom in I$$_3^ - $$ is ____________.
JEE Main 2021 (Online) 18th March Evening Shift
The number of species below that have two lone pairs of electrons in their central atom is _________. (Round off to the Nearest Integer).SF4, BF$$_4^ ...
JEE Main 2021 (Online) 18th March Morning Shift
AX is a covalent diatomic molecule where A and X are second row elements of periodic table. Based on Molecular orbital theory, the bond order of AX is...
JEE Main 2021 (Online) 25th February Morning Shift
Among the following, the number of halide(s) which is/are inert to hydrolysis is _________.(A) BF3(B) SiCl4(C) PCl5(D) SF6...
JEE Main 2020 (Online) 6th September Morning Slot
The number of Cl = O bonds in perchloric acid is, "________".
JEE Main 2020 (Online) 7th January Morning Slot
Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver nitrate solution. ...

MCQ (More than One Correct Answer)

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