How many questions from Chemical Bonding and Molecular Structure appear in JEE?

Chemical Bonding and Molecular Structure has appeared in 151 of the last 186 JEE Main and JEE Advanced papers — about 81% of them — contributing 207 questions in total across those papers.

Is Chemical Bonding and Molecular Structure an important chapter for JEE?

Judged by how often it is actually tested, it appears in roughly 81% of papers. Chapters above about 50% are effectively guaranteed to show up every session, so they repay thorough preparation; lower-frequency chapters are better treated as targeted revision.

Where do these Chemical Bonding and Molecular Structure questions come from?

Every question is from an official JEE Main or JEE Advanced paper, transcribed from the original paper and tagged to this chapter. Answers follow the official answer key.

Chemical Bonding and Molecular Structure JEE Previous Year Questions with Answers

Q1·ChemistrySingle correctJEE Advanced 2026

The correct order of ONO bond angle in the given species is

(A) $NO_{2}^{+} < NO_{2} < NO_{3}^{-} < NO_{2}^{-}$
(B) $NO_{2}^{-} < NO_{3}^{-} < NO_{2} < NO_{2}^{+}$
(C) $NO_{3}^{-} < NO_{2}^{-} < NO_{2} < NO_{2}^{+}$
(D) $NO_{2}^{-} < NO_{3}^{-} < NO_{2}^{+} < NO_{2}$

Q2·ChemistrySingle correctJEE Advanced 2026

Consider the following species:

\mathrm{SOCl_2}

,

\mathrm{XeOF_4}

,

\mathrm{ClF_3}

,

\mathrm{ClF_5}

,

\mathrm{XeF_5^+}

,

\mathrm{SO_3^{2-}}

,

\mathrm{XeF_3^+}

,

\mathrm{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

(A)P → 1; Q → 2; R → 5; S → 3
(B)P → 5; Q → 4; R → 2; S → 3
(C)P → 3; Q → 2; R → 1; S → 4
(D)P → 1; Q → 3; R → 5; S → 4

Q3·ChemistrySingle correctJEE Advanced 2026

The correct order of dipole moments for the given species is

(A) $\mathrm{BF_3} = \mathrm{NH_4^+} < \mathrm{NF_3} < \mathrm{NH_3}$
(B) $\mathrm{BF_3} < \mathrm{NH_4^+} < \mathrm{NF_3} < \mathrm{NH_3}$
(C) $\mathrm{NH_4^+} < \mathrm{BF_3} < \mathrm{NH_3} < \mathrm{NF_3}$
(D) $\mathrm{BF_3} < \mathrm{NH_4^+} < \mathrm{NH_3} < \mathrm{NF_3}$

Q4·ChemistrySingle correctJEE Main 2026

Bromine trifluoride autoionizes to form

BrF_2^{\oplus}

and

BrF_4^{\ominus}

. The shapes of the cation and anion are respectively ________, and ________.

(A)bent, square planar
(B)linear, square planar
(C)bent, see-saw
(D)linear, tetrahedral

Q5·ChemistrySingle correctJEE Main 2026

The pairs among A = [SO₃²⁻, CO₃²⁻], B = [O₂²⁻, F₂], C = [CN⁻, CO], D = [NH₃, H₃O⁺] and E = [MnO₄²⁻, CrO₄²⁻] that do not have similar Lewis dot structure are

(A)A, B and E
(B)A and E
(C)B, C and D
(D)C and D

Q6·ChemistrySingle correctJEE Main 2026

Given below are two statements : Statement I : The number of compounds among

\mathrm{SO_{2}}

,

\mathrm{SO_{3}}

,

\mathrm{SF_{4}}

,

\mathrm{SF_{6}}

and

\mathrm{H_{2}S}

in which sulphur does not obey the Octet rule is 3. Statement II : Among

[\mathrm{H_{2}O}

,

\mathrm{ClF_{3}}

,

\mathrm{SF_{4}}]

,

[\mathrm{NH_{3}}

,

\mathrm{BrF_{5}}

,

\mathrm{SF_{4}}]

,

[\mathrm{BrF_{5}}

,

\mathrm{ClF_{3}}

,

\mathrm{XeF_{4}}]

and

[\mathrm{XeF_{4}}

,

\mathrm{ClF_{3}}

,

\mathrm{H_{2}O}]

, the number of sets in which all the molecules have one lone pair of electrons on the central atom is 1. In the light of the above statements, choose the correct answer from the options given below :

(A)Both Statement I and Statement II are true
(B)Both Statement I and Statement II are false
(C)Statement I is true but Statement II is false
(D)Statement I is false but Statement II is true

Q7·ChemistryNumericalJEE Main 2026

Consider the following species: BrF

_5

, XeF

_5^-

, BF

_4^-

, ICl

_4^-

, XeF

_4

, SF

_4

, NH

_4^+

, ClF

_3

, XeF

_2

, ICl

_2^-

Number of species having sp

^3

d hybridized central atom is __________.

Q8·ChemistrySingle correctJEE Main 2026

Which of the following pictorial diagram most correctly represents the π* (π-antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction (

\xrightarrow{\text{z-axis}}

)?

(A)(1)
(B)(2)
(C)(3)
(D)(4)

Q9·ChemistrySingle correctJEE Main 2026

Given below are two statements : Statement (I) : The correct sequence of bond lengths in the following species is :

\mathrm{O_{2}^{+}} < \mathrm{O_{2}} < \mathrm{O_{2}^{-}} < \mathrm{O_{2}^{2-}}

Statement (II) : The correct sequence of number of unpaired electrons in the following species is :

\mathrm{O_{2}} > \mathrm{O_{2}^{+}} > \mathrm{O_{2}^{-}} > \mathrm{O_{2}^{2-}}

In the light of the above statements, choose the correct answer from the options given below :

(A)Both Statement I and Statement II are true
(B)Both Statement I and Statement II are false
(C)Statement I is true but Statement II is false
(D)Statement I is false but Statement II is true

Q10·ChemistrySingle correctJEE Main 2026

SF_4

is isostructural with: A.

BrF_4^{\ominus}

B.

CH_4

C.

IF_4^{\oplus}

D.

XeF_4

E.

XeO_2F_2

Choose the correct answer from the options given below:

(A)C Only
(B)C and E Only
(C)A and D Only
(D)B and E Only

Q11·ChemistrySingle correctJEE Main 2026

Given below are two statements: Statement I: The number of species among BF

_{4}^{-}

, SiF

_{4}

, XeF

_{4}

and SF

_{4}

, that have unequal E–F bond lengths is two. Here, E is the central atom. Statement II: Among O

_{2}^{-}

, O

_{2}^{2-}

, F

_{2}

and O

_{2}^{+}

, O

_{2}^{-}

has the highest bond order. In the light of the above statements, choose the correct answer from the options given below

(A)Both Statement I and Statement II are false
(B)Both Statement I and Statement II are true
(C)Statement I is true but Statement II is false
(D)Statement I is false but Statement II is true

Q12·ChemistrySingle correctJEE Main 2026

Pair of species among the following having same bond order as well as paramagnetic character will be-

(A) $\text{O}_{2}^{+}, \text{N}_{2}^{2-}$
(B) $\text{O}_{2}^{-}, \text{N}_{2}^{+}$
(C) $\text{O}_{2}^{+}, \text{N}_{2}^{-}$
(D) $\text{O}_{2}^{-}, \text{N}_{2}^{-}$

Q13·ChemistrySingle correctJEE Main 2026

Given below are statements about some molecules/ions. Identify the CORRECT statements. A. The dipole moment value of

NF_3

is higher than that of

NH_3

. B. The dipole moment value of

BeH_2

is zero. C. The bond order of

O_2^{2-}

and

F_2

is same. D. The formal charge on the central oxygen atom of ozone is –1. E. In

NO_2

, all the three atoms satisfy the octet rule, hence it is very stable. Choose the correct answer from the options given below :

(A)A, B, C, D & E
(B)B & C only
(C)B, C & D only
(D)A, C & D only

Q14·ChemistrySingle correctJEE Main 2026

Identify the molecule(X) with maximum number of lone pairs of electrons (obtained using Lewis dot structure) among HNO

_3

, H

_2

SO

_4

, NF

_3

and O

_3

. Choose the correct bond angle made by the central atom of the molecule (X).

(A)120°
(B)107°
(C)102°
(D)116°

Q15·ChemistrySingle correctJEE Main 2026

Two p-block elements X and Y form fluroides of the type EF

_3

. The fluoride compound XF

_3

is a Lewis acid and YF

_3

is a Lewis base. The hybridization of the central atoms of XF

_3

and YF

_3

respectively are

(A)Both sp $^3$
(B)sp $^2$ and sp $^3$
(C)sp $^3$ and sp $^2$
(D)Both sp $^2$

Q16·ChemistrySingle correctJEE Main 2026

The formal changes on the atoms marked as (1) to (4) in the Lewis representation of HnO

_3

molecule respectively are

(A)+1, 0, 0, –1
(B)0, –1, 0, +1
(C)0, +1, 0, –1
(D)0, 0, –1, +1

Q17·ChemistrySingle correctJEE Main 2026

Among

H_2S

,

H_2O

,

NF_3

,

NH_3

and

CHCl_3

, identify the molecule (X) with lowest dipole moment value. The number of lone pairs of electrons present on the central atom of the molecule (X) is :

(A)2
(B)0
(C)1
(D)3

Q18·ChemistrySingle correctJEE Main 2026

The correct increasing order of

\text{C}-\text{H}(\text{A})

,

\text{C}-\text{O}(\text{B})

,

\text{C}=\text{O}(\text{C})

and

\text{C}\equiv \text{N}(\text{D})

bonds in terms of covalent bond length is:

(A) $\text{A} < \text{B} < \text{C} < \text{D}$
(B) $\text{A} < \text{D} < \text{C} < \text{B}$
(C) $\text{D} < \text{C} < \text{B} < \text{A}$
(D) $\text{D} < \text{C} < \text{A} < \text{B}$

Q19·ChemistrySingle correctJEE Main 2026

Given below are two statements: Statement I: The number of species among SF

_4

, NH

_4^+

, [NiCl

_4

], XeF

_4

, [PtC1

_4

]

^{2-}

, SeF

_4

and [Ni(CN)

_4

]

^{2-}

, that have tetrahedral geometry is 3. Statement II: In the set [NO

_2

, BeH

_2

, BF

_3

, AIC1

_3

], all the molecules have incomplete octet around central atom. In the light of the above statements, choose the correct answer from the options given below:

(A)Statement I is true but Statement II is false
(B)Both Statement I and Statement II are false
(C)Statement I is false but Statement II is true
(D)Both Statement I and Statement II are true

Q20·ChemistryMultiple correctJEE Advanced 2025

Regarding the molecular orbital (MO) energy levels for homonuclear diatomic molecules, the INCORRECT statement(s) is(are)

(A)Bond order of $Ne_2$ is zero.
(B)The highest occupied molecular orbital (HOMO) of $F_2$ is σ-type.
(C)Bond energy of $O_2^+$ is smaller than the bond energy of $O_2$ .
(D)Bond length of $Li_2$ is larger than the bond length of $B_2$ .

Q21·ChemistryIntegerJEE Main 2025

Resonance in

X_2Y

can be represented as shown in the figure. The enthalpy of formation of

X_2Y

\left(X\equiv X(g)+\dfrac{1}{2}Y=Y(g)\to X_2Y(g)\right)

is 80 kJ mol

^{-1}

. The magnitude of resonance energy of

X_2Y

is ___ kJ mol

^{-1}

(nearest integer value). Given: Bond energies of

X\equiv X

,

X=X

,

Y=Y

and

X=Y

are 940, 410, 500 and 602 kJ mol

^{-1}

respectively. valence X : 3, Y : 2

Q22·ChemistrySingle correctJEE Main 2025

In

SO_2

,

NO_2^-

and

N_3^-

the hybridizations at the central atom are respectively:

(A) $sp^2$ , $sp^2$ and $sp$
(B) $sp^2$ , $sp$ and $sp$
(C) $sp^2$ , $sp^2$ and $sp^2$
(D) $sp$ , $sp^2$ and $sp$

Q23·ChemistrySingle correctJEE Main 2025

Match the List-I (molecule/ion) with List-II (bond pair : lone pair on the central atom). Choose the correct answer from the options given below:

List-I (Molecule/ion)	List-II (Bond pair : lone pair on the central atom)
A. $ICl_2^-$	I.4 : 2
B. $H_2O$	II.4 : 1
C. $SO_2$	III.2 : 3
D. $XeF_4$	IV.2 : 2

(A)A-IV, B-III, C-II, D-I
(B)A-III, B-IV, C-II, D-I
(C)A-III, B-IV, C-I, D-II
(D)A-IV, B-I, C-IV, D-III

Q24·ChemistrySingle correctJEE Main 2025

Which of the following molecules(s) show/s paramagnetic behavior? (A)

O_2

(B)

N_2

(C)

F_2

(D)

S_2

(E)

Cl_2

. Choose the correct answer from the options given below:

(A)B only
(B)A & C only
(C)A & E only
(D)A & D only

Q25·ChemistrySingle correctJEE Main 2025

Given below are two statements: Statement (I): for

ClF_3

, all three possible structures may be drawn as follows. Statement (II): Structure III is most stable, as the orbitals having the lone pairs are axial, where the lp–bp repulsion is minimum. In the light of the above statements, choose the most appropriate answer from the options given below:

(A)Statement I is incorrect but statement II is correct
(B)Statement I is correct but statement II is incorrect
(C)Both Statement I and statement II are correct
(D)Both Statement I and statement II are incorrect

Q26·ChemistrySingle correctJEE Main 2025

Match the LIST-I (Molecules/ion) with LIST-II (Hybridisation of central atom). Choose the correct answer from the options given below:

LIST-I (Molecules/ion)	LIST-II (Hybridisation of central atom)
A. $PF_5$	I. $dsp^2$
B. $SF_6$	II. $sp^3d$
C. $Ni(CO)_4$	III. $sp^3d^2$
D. $[PtCl_4]^{2-}$	IV. $sp^3$

(A)(A)-II, (B)-III, (C)-IV, (D)-I
(B)(A)-IV, (B)-I, (C)-II, (D)-III
(C)(A)-I, (B)-II, (C)-III, (D)-IV
(D)(A)-III, (B)-I, (C)-IV, (D)-II

Q27·ChemistrySingle correctJEE Main 2025

Which among the following molecules is (a) involved in

sp^3d

hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?

(A) $PF_5$
(B) $XeF_4$
(C) $SF_4$
(D) $XeF_2$

Q28·ChemistrySingle correctJEE Main 2025

Among

SO_2

,

NF_3

,

NH_3

,

XeF_2

,

ClF_3

and

SF_4

, the hybridization of the molecule with non-zero dipole moment and highest number of lone-pairs of electrons on the central atom is:

(A) $sp^3$
(B) $dsp^2$
(C) $sp^3d^2$
(D) $sp^3d$

Q29·ChemistryIntegerJEE Main 2025

Total number of non bonded electrons present in

NO_2^-

ion based on Lewis theory is ______.

Q30·ChemistrySingle correctJEE Main 2025

The molecules having square pyramidal geometry are:

(A)BrF $_5$ & XeOF $_4$
(B)SbF $_5$ & XeOF $_4$
(C)SbF $_5$ & PCl $_5$
(D)BrF $_5$ & PCl $_5$

Q31·ChemistryIntegerJEE Main 2025

Total number of molecules/species from following which will be paramagnetic is ______. O

_2

, O

_2^+

, O

_2^-

, NO, NO

_2

, CO, K

_2

[NiCl

_4

], [Co(NH

_3

)

_6

]Cl

_3

, K

_2

[Ni(CN)

_4

]

Q32·ChemistrySingle correctJEE Main 2025

Given below are two statements: Statement (I): Experimentally determined oxygen-oxygen bond lengths in O

_3

are found to be same and the bond length is greater than that of a O=O (double bond) but less than that of a single bond (O–O). Statement (II): The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact about the bond length in ozone. In the light of the above statements, choose the correct answer from the options given below :

(A)Statement I is true but Statement II is false
(B)Statement I is true and Statement II is true
(C)Both Statement I and Statement II are false
(D)Statement I is false but Statement II is true

Q33·ChemistrySingle correctJEE Main 2025

Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction] ? A.

2p_z

and

2p_x

B. 2s and

2p_x

C.

3d_{xy}

and

3d_{x^2-y^2}

D. 2s and

2p_z

E.

2p_z

and

3d_{z^2}

. Choose the correct answer from the options given below :

(A)E Only
(B)A and B Only
(C)D Only
(D)C and D Only

Q34·ChemistrySingle correctJEE Main 2025

Which of the following statement is true with respect to H₂O, NH₃ and CH₄? A. The central atoms of all the molecules are sp³ hybridized. B. The H-O-H, H-N-H and H-C-H angles in the above molecules are 104.5°, 107.5° and 109.5° respectively. C. The increasing order of dipole moment is CH₄ < NH₃ < H₂O. D. Both H₂O and NH₃ are Lewis acids and CH₄ a Lewis base. E. A solution of NH₃ in H₂O is basic. In this solution NH₃ and H₂O act as Lowry-Bronsted acid and base respectively. Choose the correct answer from the options given below :

(A)A, B and C only
(B)C, D and E only
(C)A, D and E only
(D)A, B, C and E only

Q35·ChemistrySingle correctJEE Main 2025

Match List-I (Octet Behaviour) with List-II (Example Molecules). Choose the correct answer from the options given below:

List-I (Octet Behaviour)	List-II (Example Molecules)
A.Molecules obeying octet rule	I.NO, NO₂
B.Molecules with incomplete octet	II.BCl₃, AlCl₃
C.Molecules with incomplete octet with odd electron	III.H₂SO₄, PCl₅
D.Molecules with expanded octet	IV.CCl₄, CO₂

(A)A-IV, B-II, C-I, D-III
(B)A-III, B-II, C-I, D-IV
(C)A-IV, B-I, C-III, D-II
(D)A-II, B-IV, C-III, D-I

Q36·ChemistrySingle correctJEE Main 2025

Arrange the following compounds in increasing order of their dipole moment: HBr, H

_2

S, NF

_3

and CHCl

_3

(A) $NF_3 < HBr < H_2S < CHCl_3$
(B) $HBr < H_2S < NF_3 < CHCl_3$
(C) $H_2S < HBr < NF_3 < CHCl_3$
(D) $CHCl_3 < NF_3 < HBr < H_2S$

Q37·ChemistryIntegerJEE Main 2025

The number of molecules/ions that show linear geometry among the following is ______: SO₂, BeCl₂, CO₂, N₃⁻, NO₂, F₂O, XeF₂, NO₂⁺, I₃⁻, O₃.

Q38·ChemistryMultiple correctJEE Advanced 2024

The option(s) in which at least three molecules follow Octet Rule is(are)

(A)CO $_{2}$ , C $_{2}$ H $_{4}$ , NO and HCl
(B)NO $_{2}$ , O $_{3}$ , HCl and H $_{2}$ SO $_{4}$
(C)BCl $_{3}$ , NO, NO $_{2}$ and H $_{2}$ SO $_{4}$
(D)CO $_{2}$ , BCl $_{3}$ , O $_{3}$ and C $_{2}$ H $_{4}$

Q39·ChemistrySingle correctJEE Advanced 2024

Based on

\mathbf{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

(A)(P) $\to$ (5), (Q) $\to$ (2), (R) $\to$ (3), (S) $\to$ (1)
(B)(P) $\to$ (5), (Q) $\to$ (3), (R) $\to$ (2), (S) $\to$ (4)
(C)(P) $\to$ (4), (Q) $\to$ (3), (R) $\to$ (2), (S) $\to$ (1)
(D)(P) $\to$ (4), (Q) $\to$ (2), (R) $\to$ (5), (S) $\to$ (3)

Q40·ChemistryNumericalJEE Main 2024

Total number of electrons present in

(\pi^{*})

molecular orbitals of

O_2

,

O_2^{+}

and

O_2^{-}

is _______.

Q41·ChemistryNumericalJEE Main 2024

The total number of species from the following in which one unpaired electron is present, is _____.

N_2, O_2, C_2^-, O_2^-, O_2^{2-}, H_2^+, CN^-, He_2^+

Q42·ChemistrySingle correctJEE Main 2024

In which one of the following pairs the central atoms exhibit

sp^2

hybridization ?

(A) $BF_3$ and $NO_2^-$
(B) $NH_2^-$ and $H_2O$
(C) $H_2O$ and $NO_2$
(D) $NH_2^-$ and $BF_3$

Q43·ChemistrySingle correctJEE Main 2024

The correct increasing order for bond angles among

BF_3

,

PF_3

and

ClF_3

is:

(A) $PF_3 < ClF_3 < BF_3$
(B) $BF_3 < PF_3 < ClF_3$
(C) $ClF_3 < PF_3 < BF_3$
(D) $BF_3 = PF_3 = ClF_3$

Q44·ChemistryNumericalJEE Main 2024

Number of molecules having bond order 2 from the following molecules is _______.

\text{C}_2

,

\text{O}_2

,

\text{Be}_2

,

\text{Li}_2

,

\text{Ne}_2

,

\text{N}_2

,

\text{He}_2

Q45·ChemistrySingle correctJEE Main 2024

Match List-I (molecules) with List-II (their shapes). Choose the correct answer from the options given below:

List-I (Molecule)	List-II (Shape)
A. $NH_3$	I.Square pyramidal
B. $BrF_5$	II.Tetrahedral
C. $PCl_5$	III.Trigonal pyramidal
D. $CH_4$	IV.Trigonal bipyramidal

(A)A-IV, B-III, C-I, D-II
(B)A-II, B-IV, C-I, D-III
(C)A-III, B-I, C-IV, D-II
(D)A-III, B-I, C-I, D-II

Q46·ChemistryNumericalJEE Main 2024

Number of molecules from the following which are exceptions to octet rule is ___.

CO_2

,

NO_2

,

H_2SO_4

,

BF_3

,

CH_4

,

SiF_4

,

ClO_2

,

PCl_5

,

BeF_2

,

C_2H_6

,

CHCl_3

,

CBr_4

Q47·ChemistrySingle correctJEE Main 2024

When

\psi_A

and

\psi_B

are the wave functions of atomic orbitals, then

\psi^*

is represented by:

(A) $\psi_A-2\psi_B$
(B) $\psi_A-\psi_B$
(C) $\psi_A+2\psi_B$
(D) $\psi_A+\psi_B$

Q48·ChemistrySingle correctJEE Main 2024

Match List-I (Compound / Species) with List-II (Shape / Geometry). Choose the correct answer from the options given below:

List-I (Compound / Species)	List-II (Shape / Geometry)
A. $SF_4$	I.Tetrahedral
B. $BrF_3$	II.Pyramidal
C. $BrO_3^{-}$	III.See saw
D. $NH_4^{+}$	IV.Bent T-shape

(A)A-II, B-III, C-I, D-IV
(B)A-III, B-IV, C-II, D-I
(C)A-II, B-IV, C-III, D-I
(D)A-III, B-II, C-IV, D-I

Q49·ChemistrySingle correctJEE Main 2024

Match List-I (Molecule / Species) with List-II (Property / Shape). Choose the correct answer from the options given below:

List-I (Molecule / Species)	List-II (Property / Shape)
A. $SO_2Cl_2$	I.Paramagnetic
B. $NO$	II.Diamagnetic
C. $NO_2^{-}$	III.Tetrahedral
D. $I_3^{-}$	IV.Linear

(A)A-IV, B-I, C-III, D-II
(B)A-III, B-I, C-II, D-IV
(C)A-II, B-III, C-I, D-IV
(D)A-III, B-IV, C-II, D-I

Q50·ChemistryNumericalJEE Main 2024

Total number of species from the following with central atom utilising

2p^2

hybrid orbitals for bonding is _______.

NH_3

,

SO_2

,

SiO_2

,

BeCl_2

,

C_2H_2

,

C_2H_4

,

BCl_3

,

HCHO

,

C_6H_6

,

BF_3

,

C_2H_4Cl_2

Q51·ChemistrySingle correctJEE Main 2024

Given below are two statements: Statement I:

PF_5

and

BrF_5

both exhibit

sp^3d

hybridisation. Statement II: Both

SF_6

and

[Co(NH_3)_6]^{3+}

exhibit

sp^3d^2

hybridisation. In the light of the above statements, choose the correct answer from the options given below:

(A)Statement I is true but Statement II is false
(B)Both Statement I and Statement II are true
(C)Both Statement I and Statement II are false
(D)Statement I is false but Statement II is true

Q52·ChemistryNumericalJEE Main 2024

The number of molecules from the following which can exhibit hydrogen bonding is _______ (nearest integer):

CH_3OH

,

H_2O

,

C_2H_6

,

C_6H_6

, (the compound shown in the figure),

HF

,

NH_3

.

Q53·ChemistrySingle correctJEE Main 2024

Match List-I (Hybridization) with List-II (Orientation in Space). Choose the correct answer from the options given below:

List-I (Hybridization)	List-II (Orientation in Space)
A. $sp^3$	I.Trigonal bipyramidal
B. $dsp^2$	II.Octahedral
C. $sp^3d$	III.Tetrahedral
D. $sp^3d^2$	IV.Square planar

(A)A-III, B-I, C-IV, D-II
(B)A-II, B-I, C-IV, D-III
(C)A-IV, B-III, C-I, D-II
(D)A-III, B-IV, C-I, D-II

Q54·ChemistryNumericalJEE Main 2024

The number of compounds from the following with zero dipole moment is __________.

\text{HF}

,

\text{H}_2

,

\text{H}_2\text{S}

,

\text{CO}_2

,

\text{NH}_3

,

\text{BF}_3

,

\text{CH}_4

,

\text{CHCl}_3

,

\text{SiF}_4

,

\text{H}_2\text{O}

,

\text{BeF}_2

.

Q55·ChemistryNumericalJEE Main 2024

In the Lewis dot structure for

\text{NO}_2^-

, the total number of valence electrons around nitrogen is ___.

Q56·ChemistrySingle correctJEE Main 2024

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A):

\text{NH}_3

and

\text{NF}_3

molecules have a pyramidal shape with a lone pair of electrons on the nitrogen atom. The resultant dipole moment of

\text{NH}_3

is greater than that of

\text{NF}_3

. Reason (R): In

\text{NH}_3

, the orbital dipole due to the lone pair is in the same direction as the resultant dipole moment of the N–H bonds; F is the most electronegative element. In the light of the above statements, choose the correct answer from the options given below:

(A)Both (A) and (R) are true and (R) is the correct explanation of (A)
(B)(A) is false but (R) is true
(C)(A) is true but (R) is false
(D)Both (A) and (R) are true but (R) is NOT the correct explanation of (A)

Q57·ChemistrySingle correctJEE Main 2024

Match List-I (interhalogen / halogen species) with List-II (molecular shape). Choose the correct answer from the options given below:

List-I	List-II
A. $\text{ICl}$	I.T-Shape
B. $\text{ICl}_3$	II.Square pyramidal
C. $\text{ClF}_5$	III.Pentagonal bipyramidal
D. $\text{IF}_7$	IV.Linear

(A)(A)-(I), (B)-(IV), (C)-(III), (D)-(II)
(B)(A)-(I), (B)-(III), (C)-(II), (D)-(IV)
(C)(A)-(IV), (B)-(I), (C)-(II), (D)-(III)
(D)(A)-(IV), (B)-(III), (C)-(II), (D)-(I)

Q58·ChemistrySingle correctJEE Main 2024

The number of

\sigma

and

\pi

bonds present in an ethylene molecule is respectively:

(A)3 and 1
(B)5 and 2
(C)4 and 1
(D)5 and 1

Q59·ChemistrySingle correctJEE Main 2024

The number of species from the following that have pyramidal geometry around the central atom is:

\text{S}_2\text{O}_3^{2-}

,

\text{SO}_4^{2-}

,

\text{SO}_3^{2-}

,

\text{S}_2\text{O}_7^{2-}

(A)4
(B)3
(C)1
(D)2

Q60·ChemistryNumericalJEE Main 2024

Number of compounds/species from the following with non-zero dipole moment is ______:

\text{BeCl}_2

,

\text{BCl}_3

,

\text{NF}_3

,

\text{XeF}_4

,

\text{CCl}_4

,

\text{H}_2\text{O}

,

\text{H}_2\text{S}

,

\text{HBr}

,

\text{CO}_2

,

\text{H}_2

,

\text{HCl}

.

Q61·ChemistrySingle correctJEE Main 2024

Which one of the following molecules has maximum dipole moment?

(A) $NF_3$
(B) $CH_4$
(C) $NH_3$
(D) $PF_3$

Q62·ChemistrySingle correctJEE Main 2024

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. Intermolecular H bonding is present in o-nitro phenol. C. Intramolecular H bonding is present in HF. D. The magnitude of H bonding depends on the physical state of the compound. E. H-bonding has powerful effect on the structure and properties of compounds. Choose the correct answer from the options given below:

(A)A only
(B)A, D, E only
(C)A, B, D only
(D)A, B, C only

Q63·ChemistrySingle correctJEE Main 2024

Number of molecules/ions from the following in which the central atom is involved in

sp^3

hybridization is ___.

NO_3^-

,

BCl_3

,

ClO_2^-

,

ClO_3^-

(A) $2$
(B) $4$
(C) $3$
(D) $1$

Q64·ChemistryNumericalJEE Main 2024

Number of molecules/species from the following having one unpaired electron is ___.

O_2

,

O_2^-

,

NO

,

CN^-

,

O_2^{2-}

Q65·ChemistryNumericalJEE Main 2024

Lowest Oxidation number of an atom in a compound

A_2B

is

-2

. The number of an electron in its valence shell is ___

Q66·ChemistrySingle correctJEE Main 2024

Arrange the bonds in order of increasing ionic character in the molecules.

LiF

,

K_2O

,

N_2

,

SO_2

and

ClF_3

.

(A) $ClF_3<N_2<SO_2<K_2O<LiF$
(B) $LiF<K_2O<ClF_3<SO_2<N_2$
(C) $N_2<SO_2<ClF_3<K_2O<LiF$
(D) $N_2<ClF_3<SO_2<K_2O<LiF$

Q67·ChemistryNumericalJEE Main 2024

The number of molecules/ion/s having trigonal bipyramidal geometry among the following is ___.

PF_5

,

BrF_5

,

PCl_5

,

[PtCl_4]^{2-}

,

BF_3

,

Fe(CO)_5

Q68·ChemistrySingle correctJEE Main 2024

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

(A) $\text{H}_2\text{O}$
(B) $\text{NH}_3$
(C) $\text{C}_2\text{H}_5\text{OH}$
(D)o-nitrophenol

Q69·ChemistrySingle correctJEE Main 2024

Given below are two statements: Statement (I): A

\pi

bonding MO has lower electron density above and below the inter-nuclear axis. Statement (II): The

\pi^*

antibonding MO has a node between the nuclei. In the light of the above statements, choose the most appropriate answer from the options given below:

(A)Both Statement I and Statement II are false
(B)Both Statement I and Statement II are true
(C)Statement I is false but Statement II is true
(D)Statement I is true but Statement II is false

Q70·ChemistryNumericalJEE Main 2024

A diatomic molecule has a dipole moment of 1.2 D. If the bond distance is

1\,\text{\AA}

, then fractional charge on each atom is ______

\times10^{-1}

esu. (Given

1\,D=10^{-18}

esu cm)

Q71·ChemistrySingle correctJEE Main 2024

Which of the following is least ionic?

(A) $BaCl_2$
(B) $AgCl$
(C) $KCl$
(D) $CoCl_2$

Q72·ChemistrySingle correctJEE Main 2024

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals A. have the same energy B. have the minimum overlap C. have same symmetry about the molecular axis D. have different symmetry about the molecular axis Choose the most appropriate from the options given below:

(A)A, B, C only
(B)A and C only
(C)B, C, D only
(D)B and D only

Q73·ChemistryNumericalJEE Main 2024

The number of species from the following in which the central atom uses

sp^3

hybrid orbitals in its bonding is ______.

NH_3

,

SO_2

,

SiO_2

,

BeCl_2

,

CO_2

,

H_2O

,

CH_4

,

BF_3

Q74·ChemistrySingle correctJEE Main 2024

The molecule/ion with square pyramidal shape is:

(A) $[Ni(CN)_4]^{2-}$
(B) $PCl_5$
(C) $BrF_5$
(D) $PF_5$

Q75·ChemistryNumericalJEE Main 2024

The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is ___

Q76·ChemistrySingle correctJEE Main 2024

Given below are two statements: Statement-I: Since fluorine is more electronegative than nitrogen, the net dipole moment of

NF_3

is greater than

NH_3

. Statement-II: In

NH_3

the orbital dipole due to lone pair and the dipole moment of NH bonds are in opposite direction, but in

NF_3

the orbital dipole due to lone pair and dipole moments of N-F bonds are in same direction. In the light of the above statements, choose the most appropriate answer from the options given below:

(A)Statement I is true but Statement II is false.
(B)Both Statement I and Statement II are false.
(C)Both Statement I and Statement II are true.
(D)Statement I is false but Statement II is true.

Q77·ChemistrySingle correctJEE Main 2024

Match List-I (molecules) with List-II (their shapes). Choose the correct answer:

List-I (Molecule)	List-II (Shape)
A. $BrF_5$	I.T-shape
B. $H_2O$	II.See saw
C. $ClF_3$	III.Bent
D. $SF_4$	IV.Square pyramidal

(A)(A)-I, (B)-II, (C)-IV, (D)-III
(B)(A)-II, (B)-I, (C)-III, (D)-IV
(C)(A)-III, (B)-IV, (C)-I, (D)-II
(D)(A)-IV, (B)-III, (C)-I, (D)-II

Q78·ChemistryNumericalJEE Main 2024

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

Q79·ChemistryNumericalJEE Main 2024

Number of compounds with one lone pair of electrons on central atom amongst following is ______ .

O_3

,

H_2O

,

SF_4

,

ClF_3

,

NH_3

,

BrF_5

,

XeF_4

Q80·ChemistryNumericalJEE Main 2024

The total number of molecules with zero dipole moment among

CH_4

,

BF_3

,

H_2O

,

HF

,

NH_3

,

CO_2

and

SO_2

is ___.

Q81·ChemistryNumericalJEE Main 2024

The total number of ‘Sigma’ and Pi bonds in 2-formylhex-4-enoic acid is ___.

Q82·ChemistryNumericalJEE Main 2024

The number of species from the following which are paramagnetic and with bond order equal to one is ______ .

H_2

,

He_2^+

,

O_2^+

,

N_2^{2-}

,

O_2^{2-}

,

F_2

,

Ne_2^+

,

B_2

Q83·ChemistryNumericalJEE Main 2024

The number of non-polar molecules from the following is __________. HF,

H_2O

,

SO_2

,

H_2

,

CO_2

,

CH_4

, HCl,

CHCl_3

,

BF_3

.

Q84·ChemistryNumericalJEE Main 2024

Sum of bond order of CO and NO

^+

is __________.

Q85·ChemistrySingle correctJEE Main 2024

Choose the polar molecule from the following:

(A) $\text{CCl}_4$
(B) $\text{CO}_2$
(C) $\text{CH}_2=\text{CH}_2$
(D) $\text{CHCl}_3$

Q86·ChemistrySingle correctJEE Advanced 2023

The correct molecular orbital diagram for

\mathrm{F_2}

molecule in the ground state is

(A)(A)
(B)(B)
(C)(C)
(D)(D)

Q87·ChemistryIntegerJEE Advanced 2023

Among

[\mathrm{I_3}]^{+}

,

[\mathrm{SiO_4}]^{4-}

,

\mathrm{SO_2Cl_2}

,

\mathrm{XeF_2}

,

\mathrm{SF_4}

,

\mathrm{ClF_3}

,

\mathrm{Ni(CO)_4}

,

\mathrm{XeO_2F_2}

,

[\mathrm{PtCl_4}]^{2-}

,

\mathrm{XeF_4}

, and

\mathrm{SOCl_2}

, the total number of species having

sp^3

hybridised central atom is ______.

Q88·ChemistrySingle correctJEE Main 2023

Consider the following statements: (A)

NF_3

molecule has a trigonal planar structure. (B) Bond length of

N_2

is shorter than

O_2

. (C) Isoelectronic molecules or ions have identical bond order. (D) Dipole moment of

H_2S

is higher than that of water molecule. Choose the correct answer from the option below:

(A)(A) and (D) are correct
(B)(C) and (D) are correct
(C)(A) and (B) are correct
(D)(B) and (C) are correct

Q89·ChemistrySingle correctJEE Main 2023

ClF_{5}

at room temperature is a:

(A)Colourless gas with trigonal bipyramidal geometry
(B)Colourless gas with square pyramidal geometry
(C)Colourless liquid with square pyramidal geometry
(D)Colourless liquid with trigonal bipyramidal geometry

Q90·ChemistrySingle correctJEE Main 2023

Given below are two statements: Statement I:

SO_2

and

H_2O

both possess V-shaped structure. Statement II: The bond angle of

SO_2

is less than that of

H_2O

. In the light of the above statements, choose the most appropriate answer from the options given below:

(A)Both Statement I and Statement II are correct
(B)Statement I is correct but Statement II is incorrect
(C)Both Statement I and Statement II are incorrect
(D)Statement I is incorrect but Statement II is correct

Q91·ChemistrySingle correctJEE Main 2023

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

(A) $O_{2}\to O_{2}^{+}$
(B) $NO\to NO^{+}$
(C) $N_{2}\to N_{2}^{+}$
(D) $O_{2}\to O_{2}^{-}$

Q92·ChemistrySingle correctJEE Main 2023

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

(A)NO $^+$
(B)O $_2^+$
(C)O $_2^-$
(D)N $_2^+$

Q93·ChemistryNumericalJEE Main 2023

The maximum number of lone pairs of electrons on the central atom from the following species is ____.

ClO_3^-,\ XeF_4,\ SF_4

and

I_3^-

.

Q94·ChemistrySingle correctJEE Main 2023

Match List-I (Species) with List-II (Geometry/Shape) and choose the correct answer.

List-I Species	List-II Geometry/Shape
A. $H_3O^+$	I.Tetrahedral
B.Acetylide anion	II.Linear
C. $NH_4^+$	III.Pyramidal
D. $ClO_2^-$	IV.Bent

(A)A-III, B-II, C-I, D-IV
(B)A-III, B-I, C-II, D-IV
(C)A-III, B-IV, C-I, D-II
(D)A-III, B-IV, C-II, D-I

Q95·ChemistryNumericalJEE Main 2023

The number of bent-shaped molecule/s from the following is _________:

N_3^-

,

NO_2^+

,

I_3^-

,

SO_2

Q96·ChemistryNumericalJEE Main 2023

The number of molecules from the following which contain only lone pairs of electrons (in addition to bond pairs) is _______ :

\text{H}_2\text{O}, \text{N}_2, \text{CO}, \text{XeF}_4, \text{NH}_3, \text{NO}, \text{CO}_2, \text{F}_2

.

Q97·ChemistrySingle correctJEE Main 2023

The pair from the following pairs having both compounds with net non-zero dipole moment is

(A)Benzene, anisidine
(B)1,4-Dichlorobenzene, 1,3-Dichlorobenzene
(C)CH $_2$ Cl $_2$ , CHCl $_3$
(D)cis-butene, trans-butene

Q98·ChemistryNumericalJEE Main 2023

The number of following factors which affect the percent covalent character of the ionic bond is ____ (a) Polarising power of cation (b) Extent of distortion of anion (c) Polarisability of the anion (d) Polarising power of anion

Q99·ChemistryNumericalJEE Main 2023

The ratio of sigma and

\pi

bonds present in pyrophosphoric acid is ____.

Q100·ChemistryNumericalJEE Main 2023

The number of species from the following carrying a single lone pair on the central atom xenon is ____.

XeF_5^+

,

XeO_3

,

XeO_2F_2

,

XeF_5^-

,

XeO_3F_2

,

XeOF_4

,

XeF_4

Q101·ChemistryNumericalJEE Main 2023

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

Q102·ChemistryNumericalJEE Main 2023

The number of species from the following which have square pyramidal structure is _____.

PF_5,\,BrF_4^{-},\,IF_5,\,BrF_5,\,XeOF_4,\,ICl_4^{-}

Q103·ChemistrySingle correctJEE Main 2023

Match List I with List II. Choose the correct answer from the options given below:

List I (Oxide)	List II (Type of Bond)
A. $N_2O_5$	I. $1\,N=O$ bond
B. $NO_2$	II. $1\,N-O-N$ bond
C. $N_2O_3$	III. $1\,N-N$ bond
D. $N_2O$	IV. $1\,N=N/1\,N\equiv N$ bond

(A)A-II, B-III, C-I, D-IV
(B)A-II, B-II, C-III, D-I
(C)A-III, B-II, C-I, D-IV
(D)A-II, B-I, C-III, D-IV

Q104·ChemistryNumericalJEE Main 2023

The number of species having a square planar shape from the following is ____.

XeF_4

,

SF_4

,

SiF_4

,

BF_4^-

,

BrF_4^-

,

[Cu(NH_3)_4]^{2+}

,

[FeCl_4]^{2-}

,

[PtCl_4]^{2-}

Q105·ChemistrySingle correctJEE Main 2023

Resonance structures of the carbonate ion

(\text{CO}_3^{2-})

are shown in the figure. Which of the following is true?

(A)All these structures are in dynamic equilibrium with each other.
(B)It is possible to identify each structure individually by some physical or chemical method.
(C)Each structure exists for equal amount of time.
(D) $\text{CO}_3^{2-}$ has a single structure i.e., resonance hybrid of the above three structures.

Q106·ChemistryNumericalJEE Main 2023

Amongst the following, the number of species having the linear shape is _________

XeF_2, I_3^+, C_2O_2, I_3^-, CO_2, SO_2, BeCl_2

and

BCl_3

Q107·ChemistrySingle correctJEE Main 2023

Match List I (molecule/ion) with List II (shape/geometry).

List I	List II
A. $XeF_4$	I.See-saw
B. $SF_4$	II.Square planar
C. $NH_4^+$	III.Bent T-shaped
D. $BrF_3$	IV.Tetrahedral

(A)A-IV, B-III, C-II, D-I
(B)A-IV, B-I, C-II, D-III
(C)A-II, B-I, C-III, D-IV
(D)A-II, B-I, C-IV, D-III

Q108·ChemistrySingle correctJEE Main 2023

Match List I (molecules/ions) with List II (number of lone pairs of electrons on the central atom). Choose the correct answer from the options given below:

List I (molecules/ions)	List II (No. of lone pairs of e⁻ on central atom)
A.IF $_7$	I.Three
B.ICl $_4^-$	II.One
C.XeF $_6$	III.Two
D.XeF $_2$	IV.Zero

(A)A-II, B-III, C-II, D-I
(B)A-II, B-I, C-IV, D-III
(C)A-IV, B-I, C-II, D-III
(D)A-IV, B-III, C-II, D-I

Q109·ChemistrySingle correctJEE Main 2023

For

OF_2

molecule consider the following: A. Number of lone pairs on oxygen is 2. B. FOF angle is less than

104.5°

. C. Oxidation state of O is

-2

. D. Molecule is bent 'V' shaped. E. Molecular geometry is linear. correct options are:

(A)A, C, D only
(B)C, D, E only
(C)A, B, D only
(D)B, E, A only

Q110·ChemistrySingle correctJEE Main 2023

According to MO theory the bond orders for

O_2^{2-}

, CO and

NO^+

respectively, are:

(A) $1,2$ and $3$
(B) $1,3$ and $2$
(C) $2,3$ and $3$
(D) $1,3$ and $3$

Q111·ChemistryNumericalJEE Main 2023

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

_3

(D) ClO

_2

(E) NO

_2^+

(F) NO

Q112·ChemistryNumericalJEE Main 2023

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

Q113·ChemistrySingle correctJEE Main 2023

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 towards the positive centre. Statement II : The crossed arrow of the dipole moment symbolizes the direction of the shift of charges in the molecules. In the light of the above statements, choose the most appropriate answer from the options given below:

(A)Statement I is incorrect but Statement II is correct
(B)Statement I is correct but Statement II is incorrect
(C)Both Statement I and Statement II are incorrect
(D)Both Statement I and Statement II are correct

Q114·ChemistrySingle correctJEE Main 2023

Order of Covalent bond: A. KF > KI; LiF > KF. B. KF < KI; LiF > KF. C.

\text{SnCl}_4

>

\text{SnCl}_2

; CuCl > NaCl. D. LiF > KF; CuCl < NaCl. E. KF < KI; CuCl > NaCl. Choose the correct answer from the options given below:

(A)C, E only
(B)B, C, E only
(C)A, B only
(D)B, C only

Q115·ChemistrySingle correctJEE Main 2023

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 correct answer from the options given below:

(A)B > A > C
(B) $A>B>C$
(C) $A=B>C$
(D)C > B > A

Q116·ChemistrySingle correctJEE Main 2023

What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species:

N_2

;

N_2^+

;

O_2

;

O_2^+

?

(A)2,1,0,1
(B)0,1,2,1
(C)0,1,0,1
(D)2,1,2,1

Q117·ChemistryMultiple correctJEE Advanced 2022

For diatomic molecules, the correct statement(s) about the molecular orbitals formed by the overlap of two

\mathrm{2p_z}

orbitals is(are)

(A) $\sigma$ orbital has a total of two nodal planes
(B) $\sigma^*$ orbital has one node in the xz-plane containing the molecular axis.
(C) $\pi$ orbital has one node in the plane which is perpendicular to the molecular axis and goes through the center of the molecule.
(D) $\pi^*$ orbital has one node in the xy-plane containing the molecular axis.

Q118·ChemistryIntegerJEE Advanced 2022

Thermal decomposition of

\mathrm{AgNO_3}

produces two paramagnetic gases. The total number of electrons present in the antibonding molecular orbitals of the gas that has the higher number of unpaired electrons is____.

Q119·ChemistryNumericalJEE Main 2022

Consider, PF

_{5}

, BrF

_{5}

, PCl

_{3}

, SF

_{6}

, [ICl

_{4}

]

^{-}

, ClF

_{3}

and IF

_{5}

. Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having sp

^{3}

d

^{2}

hybridisation is____.

Q120·ChemistrySingle correctJEE Main 2022

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

(A) $BCl_{3}$ and $SF_{6}$
(B)NO and $H_{2}SO_{4}$
(C) $SF_{6}$ and $H_{2}SO_{4}$
(D) $BCl_{3}$ and NO

Q121·ChemistryNumericalJEE Main 2022

The number of paramagnetic species among the following is __________. B

_2

, Li

_2

, C

_2

, C

_2^-

, O

_2^{2-}

, O

_2^+

and He

_2^+

Q122·ChemistrySingle correctJEE Main 2022

Given below are two statements : One is labelled as Assertion A and the other is labelled as Reason R Assertion A : Zero orbital overlap is an out of phase overlap. Reason : It results due to different orientation/direction of approach of orbitals. In the light of the above statements. Choose the correct answer from the options given below

(A)Both A and R are true and R is the correct explanation of A
(B)Both A and R are true but R is NOT the correct explanation of A
(C)A is true but R is false
(D)A is false but R is true

Q123·ChemistrySingle correctJEE Main 2022

Match List-I with List-II List-I (A)

\Psi_{MO} = \Psi_{A} - \Psi_{B}

(B)

\mu = Q \times r

(C)

\frac{N_{b} - N_{a}}{2}

(D)

\Psi_{MO} = \Psi_{A} + \Psi_{B}

List-II (I) Dipole moment (II) Bonding molecular orbital (III) Anti-bonding molecualr orbital (IV) Bond order

(A)(A)-(II), (B)-(I), (C)-(IV), (D)-(III)
(B)(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
(C)(A)-(III), (B)-(I), (C)-(IV), (D)-(II)
(D)(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

Q124·ChemistryNumericalJEE Main 2022

Amongst the following the number of oxide(s) which are paramagnetic in nature is

Na_{2}O

,

KO_{2}

,

NO_{2}

,

N_{2}O

,

ClO_{2}

, NO,

SO_{2}

,

Cl_{2}O

Q125·ChemistryNumericalJEE Main 2022

According to MO theory, number of species/ions from the following having identical bond order is______:

CN^{-}

,

NO^{+}

,

O_{2}

,

O_{2}^{+}

,

O_{2}^{2+}

Q126·ChemistrySingle correctJEE Main 2022

Given below are two statements. Statement I :

O_{2}

,

Cu^{2+}

and

Fe^{3+}

are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field. Statement II : NaCl and

H_{2}O

are weakly magnetized in opposite direction to magnetic field. In the light of the above statements, choose the most appropriate answer form the options given below :

(A)Both Statement I and Statement II are correct.
(B)Both Statement I and Statement II are incorrect.
(C)Statement I is correct but Statement II is incorrect.
(D)Statement I is incorrect but Statement II is correct.

Q127·ChemistryNumericalJEE Main 2022

The number of molecule(s) or ion(s) from the following having non-planar structure is______. NO

_{3}^{-}

, H

_{2}

O

_{2}

, BF

_{3}

, PCl

_{3}

, XeF

_{4}

, SF

_{4}

, XeO

_{3}

, PH

_{4}^{+}

, SO

_{3}

, [Al(OH)

_{4}

]

^{-}

Q128·ChemistrySingle correctJEE Main 2022

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

List - I (Compound)	List - II (Shape)
A.BrF $_5$	I.bent
B.[CrF $_6$ ] $^{3-}$	II.square pyramidal
C.O $_3$	III.trigonal bipyramidal
D.PCl $_5$	IV.octahedral

(A)(A) – (I), (B) - (II), (C) - (III), (D) - (IV)
(B)(A) - (IV), (B) - (III), (C) - (II), (D) - (I)
(C)(A) - (II), (B) - (IV), (C) - (I), (D) - (III)
(D)(A) - (III), (B) - (IV), (C) - (II), (D) - (I)

Q129·ChemistrySingle correctJEE Main 2022

Arrange the following in increasing order of their covalent character. (A)

CaF_{2}

(B)

CaCl_{2}

(C)

CaBr_{2}

(D)

CaI_{2}

Choose the correct answer from the options given below.

(A)B < A < C < D
(B)A < B < C < D
(C)A < B < D < C
(D)A < C < B < D

Q130·ChemistryNumericalJEE Main 2022

Among the following species

N_{2}

,

N_{2}^{+}

,

N_{2}^{-}

,

N_{2}^{2-}

,

O_{2}

,

O_{2}^{+}

,

O_{2}^{-}

,

O_{2}^{2-}

the number of species showing diamagnetism is

Q131·ChemistrySingle correctJEE Main 2022

Consider the species CH

_4

, NH

_4^+

and BH

_4^-

. Choose the correct option with respect to the there species:

(A)They are isoelectronic and only two have tetrahedral structures
(B)They are isoelectronic and all have tetrahedral structures
(C)Only two are isoelectronic and all have tetrahedral structures
(D)Only two are isoelectronic and only two have tetrahedral structures

Q132·ChemistrySingle correctJEE Main 2022

Number of lone pair (s) of electrons on central atom and the shape of BrF

_3

molecule respectively, are :

(A)0, triangular planar.
(B)1, pyramidal.
(C)2, bent T-shape.
(D)1, bent T-shape

Q133·ChemistrySingle correctJEE Main 2022

Arrange the following in the decreasing order of their covalent character : (A) LiCl (B) NaCl (C) KCl (D) CsCl Question: Choose the most appropriate answer from the options given below :

(A)(A) > (C) > (B) > (D)
(B)(B) > (A) > (C) > (D)
(C)(A) > (B) > (C) > (D)
(D)(A) > (B) > (D) > (C)

Q134·ChemistrySingle correctJEE Main 2022

In the structure of SF

_4

, the lone pair of electrons on S is in.

(A)equatorial position and there are two lone pair-bond pair repulsions at 90°
(B)equatorial position and there are three lone pair-bond pair repulsions at 90°
(C)axial position and there are three lone pair – bond pair repulsion at 90°.
(D)axial position and there are two lone pair – bond pair repulsion at 90°.

Q135·ChemistryNumericalJEE Main 2022

The hybridization of P exhibited in

PF_5

is

sp^{x}d^{y}

. The value of y is __________.

Q136·ChemistrySingle correctJEE Main 2022

The correct order of increasing intermolecular hydrogen bond strength is

(A)HCN < H $_2$ O < NH $_3$
(B)HCN < CH $_4$ < NH $_3$
(C)CH $_4$ < HCN < NH $_3$
(D)CH $_4$ < NH $_3$ < HCN

Q137·ChemistrySingle correctJEE Main 2022

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 List-I (Shape) (A) T-shaped (B) Trigonal planar (C) Square planar (D) See-saw List-II (Molecules) (I)

XeF_{4}

(II)

SF_{4}

(III)

ClF_{3}

(IV)

BF_{3}

(A)(A) – I, (B) – (II), (C) – (III), (D) – (IV)
(B)(A) – (III), (B) – (IV), (C) – (I), (D) – (II)
(C)(A) – (III), (B) – (IV), (C) – (II), (D) – (I)
(D)(A) – (IV), (B) – (III), (C) – (I), (D) – (II)

Q138·ChemistrySingle correctJEE Main 2022

Identify the incorrect statement for PCl

_5

from the following.

(A)In this molecule, orbitals of phosphorous are assumed to undergo sp $^{3}$ d hybridization.
(B)The geometry of PCl $_5$ is trigonal bipyramidal.
(C)PCl $_5$ has two axial bonds stronger than three equatorial bonds.
(D)The three equatorial bonds of PCl $_5$ lie in a plane.

Q139·ChemistrySingle correctJEE Main 2022

Consider the ions/molecule

O_{2}^{+}

,

O_{2}

,

O_{2}^{-}

,

O_{2}^{2-}

For increasing bond order the correct option is :

(A) $O_{2}^{2-} < O_{2}^{-} < O_{2} < O_{2}^{+}$
(B) $O_{2}^{-} < O_{2}^{2-} < O_{2} < O_{2}^{+}$
(C) $O_{2}^{-} < O_{2}^{2-} < O_{2}^{+} < O_{2}$
(D) $O_{2}^{-} < O_{2}^{+} < O_{2}^{2-} < O_{2}$

Q140·ChemistryNumericalJEE Main 2022

Amongst

SF_4

,

XeF_4

,

CF_4

and

H_2O

, the number of species with two lone pairs of electrons _______ .

Q141·ChemistrySingle correctJEE Main 2022

Number of electron deficient molecules among the following

PH_3

,

B_2H_6

,

CCl_4

,

NH_3

, LiH and

BCl_3

is

(A)0
(B)1
(C)2
(D)3

Q142·ChemistryNumericalJEE Main 2022

Amongst BeF

_2

, BF

_3

, H

_2

O, NH

_3

, CCl

_4

and HCl, the number of molecules with non-zero net dipole moment is __________.

Q143·ChemistrySingle correctJEE Main 2022

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)

N_2

(C)

O_2

(D)

C_2

(E)

B_2

Choose the most appropriate answer from the options given below :-

(A)(A), (B), (C) only
(B)(B), (C), (E) only
(C)(A), (C) only
(D)(D) only

Q144·ChemistrySingle correctJEE Main 2022

Match List – I with List - II

List-I	List-II
A.[PtCl $_4$ ] $^{2-}$	I.sp $^3$ d
B.BrF $_5$	II.d $^2$ sp $^3$
C.PCl $_5$	III.dsp $^2$
D.[Co(NH $_3$ ) $_6$ ] $^{3+}$	IV.sp $^3$ d $^2$

(A)(A)→(II), (B)→(IV), (C)→(I), (D)→(III)
(B)(A)→(III), (B)→(IV), (C)→(I), (D)→(II)
(C)(A)→(III), (B)→(I), (C)→(IV), (D)→(II)
(D)(A)→(II), (B)→(I), (C)→(IV), (D)→(III)

Q145·ChemistrySingle correctJEE Main 2022

The correct order of bound orders of C

_2^{2-}

, N

_2^{2-}

and O

_2^{2-}

is, respectively.

(A)C $_2^{2-}$ < N $_2^{2-}$ < O $_2^{2-}$
(B)O $_2^{2-}$ < N $_2^{2-}$ < C $_2^{2-}$
(C)C $_2^{2-}$ < O $_2^{2-}$ < N $_2^{2-}$
(D)N $_2^{2-}$ < C $_2^{2-}$ < O $_2^{2-}$

Q146·ChemistryNumericalJEE Main 2021

The spin-only magnetic moment value of B

_{2}^{+}

species is ______ ×10

^{-2}

BM. (Nearest integer) [Given :

\sqrt{3}

= 1.73 ]

Q147·ChemistryNumericalJEE Main 2021

According to molecular orbital theory, the number of unpaired electron(s) in

\mathrm{O_2^{2-}}

is :

Q148·ChemistryNumericalJEE Main 2021

The number of species having non–pyramidal shape among the following is _____ . (A) SO

_{3}

(B) NO

_{3}^{-}

(C) PCl

_{3}

(D) CO

_{3}^{2-}

Q149·ChemistryNumericalJEE Main 2021

AB_3

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

Q150·ChemistrySingle correctJEE Main 2021

The bond order and magnetic behaviour of

\mathrm{O_2^-}

ion are, respectively :

(A)1.5 and paramagnetic
(B)1.5 and diamagnetic
(C)2 and diamagnetic
(D)1 and paramagnetic

Q151·ChemistryNumericalJEE Main 2021

The total number of electrons in all bonding molecular orbitals of O

_2^{2-}

is ____________. (Round off to the Nearest Integer).

Q152·ChemistryNumericalJEE Main 2021

The difference between bond orders of CO and

NO^{\oplus}

is

\dfrac{x}{2}

where x _________ (Round off to the Nearest integer)

Q153·ChemistrySingle correctJEE Main 2021

In the following the correct bond order sequence is:

(A) $O_2 > O_2^- > O_2^{2-} > O_2^+$
(B) $O_2^+ > O_2 > O_2^- > O_2^{2-}$
(C) $O_2^{2-} > O_2^+ > O_2^- > O_2$
(D) $O_2^+ > O_2^- > O_2^{2-} > O_2$

Q154·ChemistrySingle correctJEE Main 2021

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

(A) $SO_2$
(B) $CO_3^{2-}$
(C) $O_2$
(D) $SO_3$

Q155·ChemistrySingle correctJEE Main 2021

Match List − I with List − II : Choose the correct answer from the options given below :

List-I (Species)	List-II (Hybrid Orbitals)
a. $SF_4$	i. $sp^3d^2$
b. $IF_5$	ii. $d^2sp^3$
c. $NO_2^+$	iii. $sp^3d$
d. $NH_4^+$	iv. $sp^3$
	v.sp

(A)(a) −(iii) , (b) −(i), (c) −(v) and (d) −(iv)
(B)(a) −(ii), (b) −(i), (c) −(iv) and (d) −(v)
(C)(a) −(i), (b) −(ii), (c) −(v) and (d) −(iii)
(D)(a) −(iv), (b) −(iii), (c) −(ii) and (d) −(v)

Q156·ChemistrySingle correctJEE Main 2021

The hybridisations of the atomic orbitals of nitrogen in

\mathrm{NO_2^-}

,

\mathrm{NO_2^+}

and

\mathrm{NH_4^+}

respectively are :

(A) $\mathrm{sp^3}$ , $\mathrm{sp}$ and $\mathrm{sp^2}$
(B) $\mathrm{sp}$ , $\mathrm{sp^2}$ and $\mathrm{sp^3}$
(C) $\mathrm{sp^2}$ , $\mathrm{sp}$ and $\mathrm{sp^3}$
(D) $\mathrm{sp^3}$ , $\mathrm{sp^2}$ and $\mathrm{sp}$

Q157·ChemistryNumericalJEE Main 2021

The number of lone pairs of electrons on the central I atom in

I_3^-

is______________.

Q158·ChemistrySingle correctJEE Main 2021

In the following molecules, Hybridisation of carbon a, b and c respectively are :

(A)sp $^{3}$ , sp, sp
(B)sp $^{3}$ , sp $^{2}$ , sp
(C)sp $^{3}$ , sp $^{2}$ , sp $^{2}$
(D)sp $^{3}$ , sp, sp $^{2}$

Q159·ChemistryNumericalJEE Main 2021

The number of species below that have two lone pairs of electrons in their central atom is ____ (Round off to the Nearest integer) SF

_{4}

, BF

_{4}^{-}

, ClF

_{3}

, AsF

_{3}

, PCl

_{5}

, BrF

_{5}

, XeF

_{4}

, SF

_{6}

Q160·ChemistrySingle correctJEE Main 2021

Amongst the following, the linear species is :

(A)NO $_{2}$
(B)Cl $_{2}$ O
(C)O $_{3}$
(D)N $_{3}^{-}$

Q161·ChemistrySingle correctJEE Main 2021

Which of the following compound CANNOT act as a Lewis base?

(A) $\mathrm{NF_3}$
(B) $\mathrm{PCl_5}$
(C) $\mathrm{SF_4}$
(D) $\mathrm{ClF_3}$

Q162·ChemistrySingle correctJEE Main 2021

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

(A)see-saw
(B)planar triangular
(C)T-shaped
(D)trigonal pyramidal

Q163·ChemistrySingle correctJEE Main 2021

Given below are two statement : one is labelled as Assertion A and the other is labelled as Reason R : Assertion A : The H–O–H bond angle in water molecule is 104.5°. Reason R : The lone pair – lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.

(A)A is false but R is true
(B)Both A and R are true, but R is not the correct correct explanation of A
(C)A is true but R is false
(D)Both A and R are true, and R is the correct explanation of A

Q164·ChemistrySingle correctJEE Main 2021

Match List-I with List-II. List-I (Molecule) List-II (Bond order) (a)

Ne_2

(i) 1 (b)

N_2

(ii) 2 (c)

F_2

(iii) 0 (d)

O_2

(iv) 3 Choose the correct answer from the options given below:

(A)(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)
(B)(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
(C)(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)
(D)(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)

Q165·ChemistrySingle correctJEE Main 2021

In CH

_2

= C = CH–CH

_3

molecule, the hybridization of carbon 1, 2, 3 and 4 respectively are:

(A)sp $^2$ , sp, sp $^2$ , sp $^3$
(B)sp $^2$ , sp $^2$ , sp $^2$ , sp $^3$
(C)sp $^2$ , sp $^3$ , sp $^2$ , sp $^3$
(D)sp $^3$ , sp, sp $^3$ , sp $^3$

Q166·ChemistrySingle correctJEE Main 2021

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 only non-covalent interactions, resulting in hydrogen bond formation Reason R : Fluorine is the most electronegative element and hydrogen bonds in HF are symmetrical In the light of the above statements, choose the most appropriate answer from the options given below :

(A)A is false but R is true
(B)Both A and R are true and R is the correct explanation of A
(C)A is true but R is false
(D)Both A and R are true and R is not the correct explanation of A

Q167·ChemistrySingle correctJEE Main 2021

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

(A)He $_{2}^{-}$
(B)He $_{2}^{+}$
(C)O $_{2}^{2-}$
(D)Be $_{2}$

Q168·ChemistrySingle correctJEE Main 2021

Which among the following species has unequal bond lengths ?

(A)XeF4
(B)SiF4
(C)BF $^{4}$ $^{-}$
(D)SF4

Q169·ChemistrySingle correctJEE Main 2021

Which of the following are isostructural pairs ? (A)

\mathrm{SO_4^{2-}}

and

\mathrm{CrO_4^{2-}}

(B)

\mathrm{SiCl_4}

and

\mathrm{TiCl_4}

(c)

\mathrm{NH_3}

and

\mathrm{NO_3^{-}}

(D)

\mathrm{BCl_3}

and

\mathrm{BrCl_3}

(A)A and C only
(B)A and B only
(C)B and C only
(D)C and D only

Q170·ChemistrySingle correctJEE Main 2021

The correct shape and I-I-I bond angles respectively in

I_{3}^{-}

ion are :

(A)Trigonal planar; 120º
(B)Distorted trigonal planar; 135º and 90º
(C)Linear; 180º
(D)T-shaped; 180º and 90º

Q171·ChemistrySingle correctJEE Main 2021

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

(A)LiF > LiCl ; NaCl > MgO
(B)LiF > LiCl ; MgO > NaCl
(C)LiCl > LiF ; NaCl > MgO
(D)LiCl > LiF ; MgO > NaCl

Q172·ChemistryIntegerJEE Advanced 2020

Consider the following compounds in the liquid form :

O_{2}

, HF,

H_{2}O

,

NH_{3}

,

H_{2}O_{2}

,

CCl_{4}

,

CHCl_{3}

,

C_{6}H_{6}

,

C_{6}H_{5}Cl

. When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?

Q173·ChemistryNumericalJEE Main 2020

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

Q174·ChemistrySingle correctJEE Main 2020

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

(A) $H_2O$
(B) $CH_4$
(C) $H_2S$
(D) $NH_3$

Q175·ChemistrySingle correctJEE Main 2020

The potential energy curve for the

H_2

molecule as a function of internuclear distance is :

(A)(A)
(B)(B)
(C)(C)
(D)(D)

Q176·ChemistrySingle correctJEE Main 2020

The molecule in which hybrid MOs involve only one d-orbital of the central atom is :

(A)XeF $_4$
(B)[CrF $_6$ ] $^{3-}$
(C)[Ni(CN) $_4$ ] $^{2-}$
(D)BrF $_5$

Q177·ChemistrySingle correctJEE Main 2020

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

(A)A – A has the largest bond enthalpy
(B)A – D has the shortest bond length
(C)D is more electronegative than other atoms
(D)A – B has the stiffest bond.

Q178·ChemistrySingle correctJEE Main 2020

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

(A) $\underline{Xe}F_4 + SbF_5 \rightarrow$
(B) $H_2\underline{S}O_4 + NaCl \xrightarrow{420\ K}$
(C) $H_3\underline{P}O_2 \xrightarrow{\text{Disproportionation}}$
(D) $\underline{N}H_3 \xrightarrow{H^+}$

Q179·ChemistrySingle correctJEE Main 2020

Of the species, NO, NO

^+

, NO

^{2+}

and NO

^-

, the one with minimum bond strength is

(A)NO $^+$
(B)NO
(C)NO $^{2+}$
(D)NO $^-$

Q180·ChemistrySingle correctJEE Main 2020

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

(A)O $_2$ , O $_2^{-}$ or O $_2^{+}$
(B)O $_2$ or O $_2^{-}$
(C)O $_2$ + O $_2^{+}$
(D)O $_2^{-}$ or O $_2^{+}$

Q181·ChemistrySingle correctJEE Main 2020

The number of sp

^2

hybrid orbitals in a molecule of benzene is

(A)18
(B)6
(C)12
(D)24

Q182·ChemistrySingle correctJEE Main 2020

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

(A)C–F > C–Cl > C–Br > C–I
(B)C–I > C–Br > C–Cl > C–F
(C)C–Cl > C–Br > C–I > C–F
(D)C–Br > C–I > C–Cl > C–F

Q183·ChemistrySingle correctJEE Main 2020

The dipole moments of CCl

_4

, CHCl

_3

ad CH

_4

are in the order

(A)CHCl $_3$ < CH $_4$ = CCl $_4$
(B)CCl $_4$ < CH $_4$ < CHCl $_3$
(C)CH $_4$ = CCl $_4$ < CHCl $_3$
(D)CH $_4$ < CCl $_4$ < CHCl $_3$

Q184·ChemistrySingle correctJEE Main 2020

The bond order and the magnetic characteristics of

CN^-

are

(A)3, paramagnetic
(B)2½, diamagnetic
(C)3, diamagnetic
(D)2½, paramagnetic

Q185·ChemistryMultiple correctJEE Advanced 2019

Each of the following options contains a set of four molecules, Identify the option(s) where all four molecules possess permanent dipole moment at room temperature.

(A)SO $_{2}$ , C $_{6}$ H $_{5}$ Cl, H $_{2}$ Se, BrF $_{5}$
(B)BeCl $_{2}$ , CO $_{2}$ , BCl $_{3}$ , CHCl $_{3}$
(C)BF $_{3}$ , O $_{3}$ , SF $_{6}$ , XeF $_{6}$
(D)NO $_{2}$ , NH $_{3}$ , POCl $_{3}$ , CH $_{3}$ Cl

Q186·ChemistryNumericalJEE Advanced 2019

Among B

_{2}

H

_{6}

, B

_{3}

N

_{3}

H

_{6}

, N

_{2}

O, N

_{2}

O

_{4}

, H

_{2}

S

_{2}

O

_{3}

and H

_{2}

S

_{2}

O

_{8}

, the total number of molecules containing covalent bond between two atoms of the same kind is

Q187·ChemistrySingle correctJEE Main 2019

The correct statement among the following is

(A) $(SiH_3)_3N$ is planar and less basic than $(CH_3)_3N$ .
(B) $(SiH_3)_3N$ is planar and more basic than $(CH_3)_3N$ .
(C) $(SiH_3)_3N$ is pyramidal and less basic than $(CH_3)_3N$ .
(D) $(SiH_3)_3N$ is pyramidal and more basic than $(CH_3)_3N$ .

Q188·ChemistrySingle correctJEE Main 2019

Among the following, the molecule expected to be stabilized by anion formation is:

(A) $F_2$
(B) $C_2$
(C) $O_2$
(D)NO

Q189·ChemistrySingle correctJEE Main 2019

Among the following species, the diamagnetic molecule is

(A)O $_2$
(B)NO
(C)B $_2$
(D)CO

Q190·ChemistrySingle correctJEE Main 2019

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?

(A) $O_2^{2-}$
(B) $C_2^{2-}$
(C) $O_2$
(D) $N_2^{2-}$

Q191·ChemistrySingle correctJEE Main 2019

The ion that has

sp^{3}d^{2}

hybridization for the central atom is:

(A) $[IF_{6}]^{-}$
(B) $[ICl_{4}]^{-}$
(C) $[ICl_{2}]^{-}$
(D) $[BrF_{2}]^{-}$

Q192·ChemistrySingle correctJEE Main 2019

Two pi and half sigma bonds are present in

(A)O $_{2}^{+}$
(B)N $_{2}$
(C)O $_{2}$
(D)N $_{2}^{+}$

Q193·ChemistrySingle correctJEE Main 2019

The type of hybridisation and number of lone pair(s) of electrons of Xe in XeOF

_{4}

respectively are

(A)sp $^{3}$ d $^{2}$ and 1
(B)sp $^{3}$ d and 2
(C)sp $^{3}$ d $^{2}$ and 2
(D)sp $^{3}$ d and 1

Q194·ChemistrySingle correctJEE Main 2019

According to molecular orbital theory, which of the following is true with respect to Li

_{2}^{+}

and Li

_{2}^{-}

?

(A)Li $_{2}^{+}$ is unstable and Li $_{2}^{-}$ is stable
(B)Li $_{2}^{+}$ is stable and Li $_{2}^{-}$ is unstable
(C)Both are stable
(D)Both are unstable

Q195·ChemistrySingle correctJEE Main 2019

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

(A)NO $\rightarrow$ NO $^{+}$
(B)N $_2$ $\rightarrow$ N $_2^{+}$
(C)O $_2$ $\rightarrow$ O $_2^{+}$
(D)O $_2$ $\rightarrow$ O $_2^{2-}$

Q196·ChemistryNumericalJEE Advanced 2018

Among the species given below, the total number of diamagnetic species is ___. H atom,

NO_{2}

monomer,

O_{2}^{-}

(superoxide), dimeric sulphur in vapour phase,

Mn_{3}O_{4}

,

(NH_{4})_{2}[FeCl_{4}]

,

(NH_{4})_{2}[NiCl_{4}]

,

K_{2}MnO_{4}

,

K_{2}CrO_{4}

Q197·ChemistryIntegerJEE Advanced 2017

Among

H_{2}, He_{2}^{+}, Li_{2}, Be_{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)

Q198·ChemistryMultiple correctJEE Advanced 2017

Among the following, the correct statement(s) is(are)

(A) $\mathrm{Al(CH_{3})_{3}}$ has the three-centre two-electron bonds in its dimeric structure
(B) $\mathrm{BH_{3}}$ has the three-centre two-electron bonds in its dimeric structure
(C) $\mathrm{AlCl_{3}}$ has the three-centre two-electron bonds in its dimeric structure
(D)The Lewis acidity of $\mathrm{BCl_{3}}$ is greater than that of $\mathrm{AlCl_{3}}$

Q199·ChemistryIntegerJEE Advanced 2017

The sum of the number of lone pairs of electrons on each central atom in the following species is

\left[TeBr_{6}\right]^{2-}, \left[BrF_{2}\right]^{+}, SNF_{3}

, and

\left[XeF_{3}\right]^{-}

(Atomic numbers : N = 7, F = 9, S = 16, Br = 35, Te = 52, Xe = 54)

Q200·ChemistryMultiple correctJEE Advanced 2016

The compound(s) with TWO lone pairs of electrons on the central atom is(are)

(A) $BrF_{5}$
(B) $ClF_{3}$
(C) $XeF_{4}$
(D) $SF_{4}$

Q201·ChemistryMultiple correctJEE Advanced 2016

According to Molecular Orbital Theory

(A) $C_{2}^{2-}$ is expected to be diamagnetic
(B) $O_{2}^{2+}$ expected to have a longer bond length than $O_{2}$
(C) $N_{2}^{+}$ and $N_{2}^{-}$ have the same bond order
(D) $He_{2}^{+}$ has the same energy as two isolated He atoms

Q202·ChemistryIntegerJEE Advanced 2015

The total number of lone pairs of electrons in

\mathrm{N_{2}O_{3}}

is

Q203·ChemistryIntegerJEE Advanced 2015

Among the triatomic molecules/ions,

\mathrm{BeCl_{2}}

,

\mathrm{N_{3}^{-}}

,

\mathrm{N_{2}O}

,

\mathrm{NO_{2}^{+}}

,

\mathrm{O_{3}}

,

\mathrm{SCl_{2}}

,

\mathrm{ICl_{2}^{-}}

,

\mathrm{I_{3}^{-}}

and

\mathrm{XeF_{2}}

, 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]

Q204·ChemistryMultiple correctJEE Advanced 2014

Hydrogen bonding plays a central role in the following phenomena:

(A)Ice floats in water.
(B)Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions.
(C)Formic acid is more acidic than acetic acid.
(D)Dimerisation of acetic acid in benzene.

Q205·ChemistrySingle correctJEE Advanced 2014

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.

List-I	List-II
P.see figure	1. $p - d$ $\pi$ antibonding
Q.see figure	2. $d - d$ $\sigma$ bonding
R.see figure	3. $p - d$ $\pi$ bonding
S.see figure	4. $d - d$ $\sigma$ antibonding

(A)P-2, Q-1, R-3, S-4
(B)P-4, Q-3, R-1, S-2
(C)P-2, Q-3, R-1, S-4
(D)P-4, Q-1, R-3, S-2

Q206·ChemistrySingle correctJEE Advanced 2014

Assuming

2s - 2p

mixing is NOT operative, the paramagnetic species among the following is

(A) $\mathrm{Be}_2$
(B) $\mathrm{B}_2$
(C) $\mathrm{C}_2$
(D) $\mathrm{N}_2$

Q207·ChemistryIntegerJEE Advanced 2013

The total number of lone-pairs of electrons in melamine is

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