Chemical Bonding & Molecular Structure · Chemistry · JEE Main

The correct increasing order for bond angles among $$\mathrm{BF}_3, \mathrm{PF}_3$$ and $$\mathrm{ClF}_3$$ is :

In which one of the following pairs the central atoms exhibit $$\mathrm{sp}^2$$ hybridization ?

The shape of carbocation is :

When $$\psi_{\mathrm{A}}$$ and $$\psi_{\mathrm{B}}$$ are the wave functions of atomic orbitals, then $$\sigma^*$$ is represented by :

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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...

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...

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...

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...

Number of $$\sigma$$ and $$\pi$$ bonds present in ethylene molecule is respectively :

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...

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...

Number of molecules/ions from the following in which the central atom is involved in $$\mathrm{sp}^3$$ hybridization is ________. $$\mathrm{NO}_3^{-},...

Which one of the following molecules has maximum dipole moment?

Given below are two statements : Statement (I) : A $\pi$ bonding MO has lower electron density above and below the inter-nuclear axis. Statement (II)...

Select the compound from the following that will show intramolecular hydrogen bonding.

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...

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 ...

Which of the following is least ionic?

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...

Given below are two statements: Statement - I: Since Fluorine is more electronegative than nitrogen, the net dipole moment of $$\mathrm{NF}_3$$ is gre...

The molecule / ion with square pyramidal shape is

Aluminium chloride in acidified aqueous solution forms an ion having geometry

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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...

The difference in energy between the actual structure and the lowest energy resonance structure for the given compound is

Choose the polar molecule from the following:

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...

Consider the following statements: (A) NF3 molecule has a trigonal planar structure. (B) Bond length of $\mathrm{N}_{2}$ is shorter than $\mathrm{O}...

Given below are two statements : Statement I : $$\mathrm{SO}_{2}$$ and $$\mathrm{H}_{2} \mathrm{O}$$ both possess V-shaped structure. Statement II : T...

In which of the following processes, the bond order increases and paramagnetic character changes to diamagnetic one ?

$$\mathrm{ClF}_{5}$$ at room temperature is a:

The bond order and magnetic property of acetylide ion are same as that of

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The compound which does not exist is

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$$\mathrm{O}-\mathrm{O}$$ bond length in $$\mathrm{H}_{2} \mathrm{O}_{2}$$ is $$\underline{\mathrm{X}}$$ than the $$\mathrm{O}-\mathrm{O}$$ bond lengt...

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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...

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According to MO theory the bond orders for $$\mathrm{O}$$$$_2^{2 - }$$, $$\mathrm{CO}$$ and $$\mathrm{NO^+}$$ respectively, are

The magnetic behaviour of $$\mathrm{Li_2O,Na_2O_2}$$ and $$\mathrm{KO_2}$$, respectively, are :

The bond dissociation energy is highest for

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 ...

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^ + }...

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...

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 ...

Which of the following pair of molecules contain odd electron molecule and an expanded octet molecule?

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,...

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Given below are two statements. Statement I: $$\mathrm{O}_{2}, \mathrm{Cu}^{2+}$$, and $$\mathrm{Fe}^{3+}$$ are weakly attracted by magnetic field and...

Arrange the following in increasing order of their covalent character. A. $$\mathrm{CaF}_{2}$$ B. $$\mathrm{CaCl}_{2}$$ C. $$\mathrm{CaBr}_{2}$$ D. $$...

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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...

Consider the species CH4, NH$$_4^ + $$ and BH$$_4^ - $$. Choose the correct option with respect to the these species.

Number of lone pair(s) of electrons on central atom and the shape BrF3 molecule respectively, are

In the structure of SF4, the lone pair of electrons on S is in.

Identify the incorrect statement for PCl5 from the following.

The correct order of increasing intermolecular hydrogen bond strength is

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. ...

Consider the ions/molecule O$$_2^ + $$, O2, O$$_2^ - $$, O$$_2^ {2-} $$ For increasing bond order the correct option is :...

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 ...

Number of electron deficient molecules among the following PH3, B2H6, CCl4, NH3, LiH and BCl3 is...

The correct order of bond orders of $${C_2}^{2 - }$$, $${N_2}^{2 - }$$ and $${O_2}^{2 - }$$ is, respectively

Number of paramagnetic oxides among the following given oxides is ____________.Li2O, CaO, Na2O2, KO2, MgO and K2O...

Match List - I with List - II :Choose the most appropriate answer from the options given below :...

Match items of List-I with those of List-II : List - I(Property) List - II(Example) (a) Diamagnetism (i) ...

The bond order and magnetic behaviour of $$O_2^ - $$ ion are respectively :

In the following the correct bond order sequence is :

Identify the species having one $$\pi$$-bond and maximum number of canonical forms from the following :

Match List-I with List-II : List-I(Species) List-II(Hybrid Orbitals) (a) $$S{F_4}$$ (i) $$s{p^3}{d^2}$$ ...

The hybridisations of the atomic orbitals of nitrogen in NO$$_2^ - $$, NO$$_2^ + $$ and NH$$_4^ + $$ respectively are.

Amongst the following, the linear species is :

A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is :

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...

Match List - I with List - II. List - I (Molecule) List - II (Bond order) (a) $$N{e_2}$$ (i) 1 ...

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...

Which among the following species has unequal bond lengths?

According to molecular orbital theory, the species among the following that does not exist is :

The correct set from the following in which both pairs are in correct order of melting point is :

The correct shape and $$I - I - I$$ bond angles respectively in $$I_3^ - $$ ion are :

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 ...

The compound that has the largest H–M–H bond angle (M = N, O, S, C) is :

The potential energy curve for the H2 molecule as a function of internuclear distance is :

The structure of PCl5 in the solid state is :

The reaction in which the hybridisation of the underlined atom is affected is :

The intermolecular potential energy for the molecules A, B, C and D given below suggests that : ...

Of the species, NO, NO+, NO2+ and NO- , the one with minimum bond strength is :

The molecular geometry of SF6 is octahedral. What is the geometry of SF4 (including lone pair(s) of electrons, if any)?

The shape / structure of [XeF5]– and XeO3F2, respectively, are

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If AB4 molecule is a polar molecule, a possible geometry of AB4 is

The number of sp2 hybrid orbitals in a molecule of benzene is :

If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :

Arrange the following bonds according to their average bond energies in descending order : C–Cl, C–Br, C–F, C–I

The bond order and the magnetic characteristics of CN- are :

The dipole of CCl4, CHCl3 and CH4 are in the order :

The relative strength of interionic/intermolecular forces in decreasing order is :

The correct statement among the following is :

The oxoacid of sulphur that does not contain bond between sulphur atoms is

During the change of O2 to O2- , the incoming electron goes to the orbital :

HF has highest boiling point among hydrogen halides, because it has :

Among the following species, the diamagnetic molecule is

Among the following, the molecule expected to be stabilized by anion formation is : C2, O2, NO, F2

The correct statement about ICl5 and $$ICl_4^-$$ is

The covalent alkaline earth metal halide (X = Cl, Br, I) is :

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?

The ion that has sp3d2 hybridization for the central atom, is :

The pair that contains two P – H bonds in each of the oxoacids is

Two pi and half sigma bonds are present in :

The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:

In which of the following process, the bond order has increased and paramagnetic character has charged to diamagnetic ?

According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2$$-$$ ?

Which of the following conversions involves change in both shape and hybridisation ?

The incorrect geometry is represented by :

According to molecular orbital theory, which of the following will not be a viable molecule?

Total number of lone pair of electrons in $${\rm I}_3^ - $$ ion is

Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2SO4 ...

Which of the following best describes the diagram below of a molecular orbital ? ...

In the molecular orbital diagram for the molecular ion, N2+, the number of electrons in the $$\sigma $$2pz molecular orbital is : ...

Identify the pair in which the geometry of the species is $$T$$-shape and square - pyraidal, respectively :

The decreasing order of bond angles in BF3, NH3, PF3 and I3- is :

In hydrogen azide (above) the bond orders of bond (I) and (II) are :...

The group having triangular planar structures is :

sp3d2 hybridization is not displayed by :

Which of the following is paramagnetic ?

Which of the following species is not paramagnetic?

The bond angle H - X - H is the greatest in the compound :

The group of molecules having identical shape is :

The species in which the $\mathrm{N}$ atom is in a state of $s p$ hybridization is :

The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is:

In which of the following pairs of molecules/ions, both the species are not likely to exist?

Stability of the species Li2, $$Li_2^−$$ and $$Li_2^+$$ increases in the order of:

In which of the following pairs the two species are not isostructural ?

Among the following the maximum covalent character is shown by the compound :

The hybridization of orbitals of N atom in $$NO_3^-$$, $$NO_2^+$$ and $$NH_4^+$$ are respectively :

The structure of IF7 is :

Using MO theory, predict which of the following species has the shortest bond length?

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...

Which of the following pair of species have the same bond order?

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

Which of the following species exhibits the diamagnetic behaviour?

In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?

Which of the following hydrogen bonds is the strongest?

In which of the following molecules/ions are all the bonds not equal?

The decreasing values of bond angles from NH3 (106o) to SbH3 (91o ) down group-15 of the periodic table is due to ...

Which of the following molecules/ions does not contain unpaired electrons?

Lattice energy of an ionic compounds depends upon

Which one of the following species is diamagnetic in nature?

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?

The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is

Which one of the following has the regular tetrahedral structure? (Atomic nos : B = 5, S = 16, Ni = 28, Xe = 54)

The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively

The maximum number of 90° angles between bond pair of electrons is observed in

Which one of the following compounds has the smallest bond angle in its molecule?

The pair of species having identical shapes for molecules of both species is

Which one of the following pairs of molecules will have permanent dipole moments for both members

Hybridisation of underline atom changes in

In which of the following species the interatomic bond angle is 109o28' ?

A square planar complex is formed by hybridisation of which atomic orbitals ?

Which of the following statements is true?

In which of the following species is the underlined carbon having sp3 hybridisation?

Which of the following are arranged in an increasing order of their bond strengths?

Total number of electrons present in $$\left(\pi^*\right)$$ molecular orbitals of $$\mathrm{O}_2, \mathrm{O}_2^{+}$$ and $$\mathrm{O}_2^{-}$$ is _____...

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^{-}, ...

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...

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...

Consider the following reactions The number of protons that do not involve in hydrogen bonding in the product B is _________....

Total number of species from the following with central atom utilising $$\mathrm{sp}^2$$ hybrid orbitals for bonding is ________. $$\mathrm{NH}_3, \ma...

Number of molecules from the following which can exhibit hydrogen bonding is _________. (nearest integer) ...

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...

In the lewis dot structure for $$\mathrm{NO}_2^{-}$$, total number of valence electrons around nitrogen is _________.

Number of compounds / species from the following with non-zero dipole moment is _________. $$\mathrm{BeCl}_2, \mathrm{BCl}_3, \mathrm{NF}_3, \mathrm{X...

Number of molecules/species from the following having one unpaired electron is ________. $$\mathrm{O}_2, \mathrm{O}_2^{-1}, \mathrm{NO}, \mathrm{CN}^{...

The number of molecules/ion/s having trigonal bipyramidal shape is _______. $\mathrm{PF}_5, \mathrm{BrF}_5, \mathrm{PCl}_5,\left[\mathrm{Pt} \mathrm{...

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 _______.

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...

The number of species from the following in which the central atom uses $$\mathrm{sp}^3$$ hybrid orbitals in its bonding is __________. $$\mathrm{NH}_...

The total number of molecular orbitals formed from $$2 \mathrm{s}$$ and $$2 \mathrm{p}$$ atomic orbitals of a diatomic molecule is __________.

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...

The total number of anti bonding molecular orbitals, formed from $$2 s$$ and $$2 p$$ atomic orbitals in a diatomic molecule is _______.

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...

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...

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,...

Sum of bond order of CO and NO$$^+$$ is ________.

The maximum number of lone pairs of electrons on the central atom from the following species is ____________. $$\mathrm{ClO}_{3}{ }^{-}, \mathrm{XeF}_...

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...

The number of bent-shaped molecule/s from the following is __________ N$$_3^-$$, NO$$_2^-$$, I$$_3^-$$, O$$_3$$, SO$$_2$$

The sum of lone pairs present on the central atom of the interhalogen IF$$_5$$ and IF$$_7$$ is _________

The number of species from the following carrying a single lone pair on central atom Xenon is ___________. $$\mathrm{XeF}_{5}^{+}, \mathrm{XeO}_{3}, \...

The number of following factors which affect the percent covalent character of the ionic bond is _________ (A) Polarising power of cation (B) Extent o...

The number of species having a square planar shape from the following is __________. $$\mathrm{XeF}_{4}, \mathrm{SF}_{4}, \mathrm{SiF}_{4}, \mathrm{BF...

In an ice crystal, each water molecule is hydrogen bonded to ____________ neighbouring molecules.

The number of species from the following which have square pyramidal structure is _________ $$\mathrm{PF}_{5}, \mathrm{BrF}_{4}^{-}, \mathrm{IF}_{5}, ...

Amongst the following, the number of species having the linear shape is _________. $\mathrm{XeF}_{2}, \mathrm{I}_{3}^{+}, \mathrm{C}_{3} \mathrm{O}_{...

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$$_...

The total number of lone pairs of electrons on oxygen atoms of ozone is __________.

Consider, $$\mathrm{PF}_{5}, \mathrm{BrF}_{5}, \mathrm{PCl}_{3}, \mathrm{SF}_{6},\left[\mathrm{ICl}_{4}\right]^{-}, \mathrm{ClF}_{3}$$ and $$\mathrm{I...

The number of paramagnetic species among the following is ___________. $$\mathrm{B}_{2}, \mathrm{Li}_{2}, \mathrm{C}_{2}, \mathrm{C}_{2}^{-}, \mathrm{...

The number of interhalogens from the following having square pyramidal structure is : $$\mathrm{ClF}_{3}, \mathrm{IF}_{7}, \mathrm{BrF}_{5}, \mathrm{B...

The number of molecule(s) or ion(s) from the following having non-planar structure is ____________. $$\mathrm{NO}_{3}^{-}, \mathrm{H}_{2} \mathrm{O}_{...

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...

According to MO theory, number of species/ions from the following having identical bond order is ________. $$\mathrm{CN}^{-}, \mathrm{NO}^{+}, \mathrm...

The sum of number of lone pairs of electrons present on the central atoms of XeO3, XeOF4 and XeF6, is ______________...

Among the following species $$\mathrm{N}_{2}, \mathrm{~N}_{2}^{+}, \mathrm{N}_{2}^{-}, \mathrm{N}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{+}, \mathr...

Amongst the following, the number of molecule/(s) having net resultant dipole moment is ____________. NF3, BF3, BeF2, CHCl3, H2S, SiF4, CCl4, PF5...

The hybridization of P exhibited in PF5 is spxdy. The value of y is __________.

Amongst SF4, XeF4, CF4 and H2O, the number of species with two lone pairs of electrons is _____________....

Amongst BeF2, BF3, H2O, NH3, CCl4 and HCl, the number of molecules with non-zero net dipole moment is ____________....

The spin-only magnetic moment value of $$B_2^ + $$ species is _____________ $$\times$$ 10$$-$$2 BM. (Nearest integer) [Given : $$\sqrt 3 $$ = 1.73]...

According to molecular orbital theory, the number of unpaired electron(s) in $$O_2^{2 - }$$ is :

The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is ____________.

The number of species having non-pyramidal shape among the following is ___________.(A) SO3(B) NO$$_3^ - $$(C) PCl3(D) CO$$_3^{2 - }$$...

AB3 is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is __________. (Integer answer)

The total number of electrons in all bonding molecular orbitals of $$O_2^{2 - }$$ is ______________.(Round off to the nearest integer)

The difference between bond orders of CO and NO$$^ \oplus $$ is $${x \over 2}$$ where x = _____________. (Round off to the Nearest Integer)

The number of lone pairs of electrons on the central I atom in I$$_3^ - $$ is ____________.

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^ ...

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...

Among the following, the number of halide(s) which is/are inert to hydrolysis is _________.(A) BF3(B) SiCl4(C) PCl5(D) SF6...

The number of Cl = O bonds in perchloric acid is, "________".

Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver nitrate solution. ...

Which one of the following molecules is expected to exhibit diamagnetic behaviour?