Chemical Bonding & Molecular Structure · Chemistry · JEE Main

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MCQ (Single Correct Answer)

1

In SO2, NO2$-$ and N3$-$, the hybridizations at the central atom are respectively :

JEE Main 2025 (Online) 7th April Evening Shift
2

Given below are two statements :

Statement (I) : JEE Main 2025 (Online) 7th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 5 English 1 is more polar than JEE Main 2025 (Online) 7th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 5 English 2

Statement (II) : Boiling point of JEE Main 2025 (Online) 7th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 5 English 3 is lower than JEE Main 2025 (Online) 7th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 5 English 4 but it is more polar than JEE Main 2025 (Online) 7th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 5 English 5.

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

JEE Main 2025 (Online) 7th April Evening Shift
3

Match the List I with List II.

List - I
Molecule/Ion
List - II
Bond pair : lone pair
(on the central atom)
(A) $\mathrm{ICl}_2^{-}$ (I) $4:2$
(B) $\mathrm{H}_2 \mathrm{O}$ (II) $4:1$
(C) $\mathrm{SO_2}$ (III) $2:3$
(D) $\mathrm{XeF_4}$ (IV) $2:2$

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 7th April Morning Shift
4

Given below are two statements:

Statement (I): For JEE Main 2025 (Online) 4th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 4 English 1, all three possible structures may be drawn as follows.

JEE Main 2025 (Online) 4th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 4 English 2

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:

JEE Main 2025 (Online) 4th April Evening Shift
5

Given below are two statements.

JEE Main 2025 (Online) 4th April Morning Shift Chemistry - Chemical Bonding & Molecular Structure Question 3 English

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

JEE Main 2025 (Online) 4th April Morning Shift
6

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

A. $\mathrm{O}_2$

B. $\mathrm{N}_2$

C. $\mathrm{F}_2$

D. $\mathrm{S}_2$

E. $\mathrm{Cl}_2$

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 4th April Morning Shift
7

Given below are two statements:

Statement I : Wet cotton clothes made of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon polymer based clothes.

Statement II : Intermolecular hydrogen bonding with water molecule is more in nylon-based clothes than in the case of cotton clothes.

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

JEE Main 2025 (Online) 3rd April Evening Shift
8
Which among the following molecules is (a) involved in $\mathrm{sp}^3 \mathrm{~d}$ hybridization, (b) has different bond lengths and (c) has lone pair of electrons on the central atom?
JEE Main 2025 (Online) 2nd April Evening Shift
9

A molecule with the formula $\mathrm{AX}_4 \mathrm{Y}$ has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among $\mathrm{A}, \mathrm{X}$ and Y . Elements X and Y have first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is:

JEE Main 2025 (Online) 2nd April Morning Shift
10

Among $\mathrm{SO}_2, \mathrm{NF}_3, \mathrm{NH}_3, \mathrm{XeF}_2, \mathrm{ClF}_3$ and $\mathrm{SF}_4$, the hybridization of the molecule with nonzero dipole moment and highest number of lone-pairs of electrons on the central atom is

JEE Main 2025 (Online) 2nd April Morning Shift
11

Consider the following molecules:

JEE Main 2025 (Online) 2nd April Morning Shift Chemistry - Chemical Bonding & Molecular Structure Question 10 English

The correct order of rate of hydrolysis is :

JEE Main 2025 (Online) 2nd April Morning Shift
12

Consider ' n ' is the number of lone pair of electrons present in the equatorial position of the most stable structure of $\mathrm{ClF}_3$. The ions from the following with ' n ' number of unpaired electrons are

A. $\mathrm{V}^{3+}$

B. $\mathrm{Ti}^{3+}$

C. $\mathrm{Cu}^{2+}$

D. $\mathrm{Ni}^{2+}$

E. $\mathrm{Ti}^{2+}$

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 28th January Morning Shift
13

The molecules having square pyramidal geometry are

JEE Main 2025 (Online) 28th January Morning Shift
14

Given below are two statements :

Statement (I) : Experimentally determined oxygen-oxygen bond lengths in the $\mathrm{O}_3$ are found to be same and the bond length is greater than that of a $\mathrm{O}=\mathrm{O}$ (double bond) but less than that of a single $(\mathrm{O}-\mathrm{O})$ bond.

Statement (II) : The strong lone pair-lone pair repulsion between oxygen atoms is solely responsible for the fact that the bond length in ozone is smaller than that of a double bond $(\mathrm{O}=\mathrm{O})$ but more than that of a single bond $(\mathrm{O}-\mathrm{O})$.

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

JEE Main 2025 (Online) 24th January Evening Shift
15

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. $2 \mathrm{p}_{\mathrm{z}}$ and $2 \mathrm{p}_{\mathrm{x}}$

B. 2 s and $2 \mathrm{p}_{\mathrm{x}}$

C. $3 d_{x y}$ and $3 d_{x^2-y^2}$

D. 2 s and $2 \mathrm{p}_{\mathrm{z}}$

E. $2 p_z$ and $3 d_{x^2-y^2}$

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 24th January Morning Shift
16

Which of the following statement is true with respect to $\mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3$ and $\mathrm{CH}_4$ ?

A. The central atoms of all the molecules are $\mathrm{sp}^3$ hybridized.

B. The $\mathrm{H}-\mathrm{O}-\mathrm{H}, \mathrm{H}-\mathrm{N}-\mathrm{H}$ and $\mathrm{H}-\mathrm{C}-\mathrm{H}$ angles in the above molecules are $104.5^{\circ}, 107.5^{\circ}$ and $109.5^{\circ}$, respectively.

C. The increasing order of dipole moment is $\mathrm{CH}_4<\mathrm{NH}_3<\mathrm{H}_2 \mathrm{O}$.

D. Both $\mathrm{H}_2 \mathrm{O}$ and $\mathrm{NH}_3$ are Lewis acids and $\mathrm{CH}_4$ is a Lewis base.

E. A solution of $\mathrm{NH}_3$ in $\mathrm{H}_2 \mathrm{O}$ is basic. In this solution $\mathrm{NH}_3$ and $\mathrm{H}_2 \mathrm{O}$ act as Lowry-Bronsted acid and base respectively.

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 24th January Morning Shift
17

Match the List - I with List - II

List - I
(Classification of molecules based on octet rule)
List - II
(Example)
(A) Molecules obeying octet rule (I) $\mathrm{NO}, \mathrm{NO}_2$
(B) Molecules with incomplete octet (II) $\mathrm{BCl}_3, \mathrm{AlCl}_3$
(C) Molecules with incomplete octet with odd electron (III) $\mathrm{H}_2 \mathrm{SO}_4, \mathrm{PCl}_5$
(D) Molecules with expanded octet (IV) $\mathrm{CCl}_4, \mathrm{CO}_2$

Choose the correct answer from the options given below:

JEE Main 2025 (Online) 23rd January Morning Shift
18

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

$\mathrm{HBr}, \mathrm{H}_2 \mathrm{~S}, \mathrm{NF}_3$ and $\mathrm{CHCl}_3$

JEE Main 2025 (Online) 22nd January Evening Shift
19

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 Evening Shift
20

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

JEE Main 2024 (Online) 9th April Morning Shift
21

The shape of carbocation is :

JEE Main 2024 (Online) 8th April Evening Shift
22

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 Evening Shift
23

Match List I with List II

LIST I
(Molecule)
LIST II
(Shape)
A. $$\mathrm{NH_3}$$ I. Square pyramid
B. $$\mathrm{BrF_5}$$ II. Tetrahedral
C. $$\mathrm{PCl_5}$$ III. Trigonal pyramidal
D. $$\mathrm{CH_4}$$ IV. Trigonal bipyramidal

Choose the correct answer from the options given below:

JEE Main 2024 (Online) 8th April Morning Shift
24

Match List I with List II

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

Choose the correct answer from the options given below:

JEE Main 2024 (Online) 6th April Morning Shift
25

Match List I with List II

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

Choose the correct answer from the options given below:

JEE Main 2024 (Online) 6th April Morning Shift
26

Match List I with List II.

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

Choose the correct answer from the options given below :

JEE Main 2024 (Online) 5th April Evening Shift
27

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 $$\mathrm{NF}_3$$ molecule have pyramidal shape with a lone pair of electrons on nitrogen atom. The resultant dipole moment of $$\mathrm{NH}_3$$ is greater than that of $$\mathrm{NF}_3$$.

Reason (R) : In $$\mathrm{NH}_3$$, the orbital dipole due to lone pair is in the same direction as the resultant dipole moment of the $$\mathrm{N}-\mathrm{H}$$ bonds. $$\mathrm{F}$$ is the most electronegative element.

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

JEE Main 2024 (Online) 5th April Evening Shift
28

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

JEE Main 2024 (Online) 5th April Morning Shift
29

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 $$\mathrm{H}$$ bonding is present in HF.

D. The magnitude of $$\mathrm{H}$$ 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:

JEE Main 2024 (Online) 4th April Evening Shift
30

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

$$\mathrm{S}_2 \mathrm{O}_3^{2-}, \mathrm{SO}_4^{2-}, \mathrm{SO}_3^{2-}, \mathrm{S}_2 \mathrm{O}_7^{2-}$$

JEE Main 2024 (Online) 4th April Evening Shift
31

Number of molecules/ions from the following in which the central atom is involved in $$\mathrm{sp}^3$$ hybridization is ________.

$$\mathrm{NO}_3^{-}, \mathrm{BCl}_3, \mathrm{ClO}_2^{-}, \mathrm{ClO}_3^{-}$$

JEE Main 2024 (Online) 4th April Morning Shift
32

Which one of the following molecules has maximum dipole moment?

JEE Main 2024 (Online) 4th April Morning Shift
33
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 :
JEE Main 2024 (Online) 1st February Evening Shift
34
Select the compound from the following that will show intramolecular hydrogen bonding.
JEE Main 2024 (Online) 1st February Evening Shift
35
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 boiling point than $\mathrm{NH}_3$.

Reason (R) : In liquid state $\mathrm{NH}_3$ molecules are associated through vander Waal's forces, but $\mathrm{PH}_3$ molecules are associated through hydrogen bonding.

In the light of the above statements, choose the most appropriate answer from the options given below :
JEE Main 2024 (Online) 1st February Morning Shift
36
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 $\mathrm{ClF}_3$ :
JEE Main 2024 (Online) 1st February Morning Shift
37

Which of the following is least ionic?

JEE Main 2024 (Online) 31st January Evening Shift
38

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:

JEE Main 2024 (Online) 31st January Morning Shift
39

Given below are two statements:

Statement - I: Since Fluorine is more electronegative than nitrogen, the net dipole moment of $$\mathrm{NF}_3$$ is greater than $$\mathrm{NH}_3$$.

Statement - II: In $$\mathrm{NH}_3$$, the orbital dipole due to lone pair and the dipole moment of $$\mathrm{NH}$$ bonds are in opposite direction, but in $$\mathrm{NF}_3$$ 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 from the options given below:

JEE Main 2024 (Online) 30th January Evening Shift
40

The molecule / ion with square pyramidal shape is

JEE Main 2024 (Online) 30th January Evening Shift
41

Aluminium chloride in acidified aqueous solution forms an ion having geometry

JEE Main 2024 (Online) 30th January Morning Shift
42

Match List I with List II.

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

Choose the correct answer from the options given below :

JEE Main 2024 (Online) 30th January Morning Shift
43

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 increase in covalent radius from $$\mathrm{N}$$ to $$\mathrm{P}$$. However from As to Bi only a small increase in covalent radius is observed.

Reason (R) : Covalent and ionic radii in a particular oxidation state increases down the group. In the light of the above statements, choose the most appropriate answer from the options given below:

JEE Main 2024 (Online) 30th January Morning Shift
44

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

JEE Main 2024 (Online) 29th January Morning Shift
45

Choose the polar molecule from the following:

JEE Main 2024 (Online) 27th January Morning Shift
46
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 $\mathrm{P}_{4} \mathrm{O}_{10}$ are respectively :
JEE Main 2023 (Online) 15th April Morning Shift
47
Consider the following statements:

(A) NF3 molecule has a trigonal planar structure.

(B) Bond length of $\mathrm{N}_{2}$ is shorter than $\mathrm{O}_{2}$.

(C) Isoelectronic molecules or ions have identical bond order.

(D) Dipole moment of $\mathrm{H}_{2}\mathrm{S}$ is higher than that of water molecule.

Choose the correct answer from the options given below:
JEE Main 2023 (Online) 15th April Morning Shift
48

Given below are two statements :

Statement I : $$\mathrm{SO}_{2}$$ and $$\mathrm{H}_{2} \mathrm{O}$$ both possess V-shaped structure.

Statement II : The bond angle of $$\mathrm{SO}_{2}$$ is less than that of $$\mathrm{H}_{2} \mathrm{O}$$.

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

JEE Main 2023 (Online) 13th April Evening Shift
49

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
50
$$\mathrm{ClF}_{5}$$ at room temperature is a:
JEE Main 2023 (Online) 13th April Morning Shift
51

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

JEE Main 2023 (Online) 12th April Morning Shift
52

Match List - I with List - II:

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

Choose the correct answer from the options given below:

JEE Main 2023 (Online) 11th April Morning Shift
53

The compound which does not exist is

JEE Main 2023 (Online) 10th April Morning Shift
54

Match List I with List II

LIST I
Oxide
LIST II
Type of bond
A. $$\mathrm{N_2O_4}$$ I. 1 N = O bond
B. $$\mathrm{NO_2}$$ II. 1 N $$-$$ O $$-$$ N bond
C. $$\mathrm{N_2O_5}$$ III. 1 N $$-$$ N bond
D. $$\mathrm{N_2O}$$ IV. 1 N=N / N $$\equiv$$ N bond

Choose the correct answer from the options given below:

JEE Main 2023 (Online) 6th April Morning Shift
55

$$\mathrm{O}-\mathrm{O}$$ bond length in $$\mathrm{H}_{2} \mathrm{O}_{2}$$ is $$\underline{\mathrm{X}}$$ than the $$\mathrm{O}-\mathrm{O}$$ bond length in $$\mathrm{F}_{2} \mathrm{O}_{2}$$. The $$\mathrm{O}-\mathrm{H}$$ bond length in $$\mathrm{H}_{2} \mathrm{O}_{2}$$ is $$\underline{Y}$$ than that of the $$\mathrm{O}-\mathrm{F}$$ bond in $$\mathrm{F}_{2} \mathrm{O}_{2}$$.

Choose the correct option for $$\underline{X}$$ and $$\underline{Y}$$ from those given below :

JEE Main 2023 (Online) 1st February Evening Shift
56

Match List I with List II

List I List II
A. $$\mathrm{XeF_4}$$ I. See-saw
B. $$\mathrm{SF_4}$$ II. Square-planar
C. $$\mathrm{NH_{4}^{+}}$$ III. Bent T-shaped
D. $$\mathrm{BrF_3}$$ IV. Tetrahedral

Choose the correct answer from the options given below :

JEE Main 2023 (Online) 31st January Morning Shift
57

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. Oxidation state of $$\mathrm{O}$$ is $$-2$$.

D. Molecule is bent '$$\mathrm{V}$$' shaped.

E. Molecular geometry is linear.

correct options are:

JEE Main 2023 (Online) 30th January Morning Shift
58

Match List I with List II

List I
(molecules/ions)
List II
(No. of lone pairs of e$$^-$$ on central atom)
A. $$\mathrm{IF_7}$$ I. Three
B. $$\mathrm{ICl}$$$$_4^ - $$ II. One
C. $$\mathrm{XeF_6}$$ III. Two
D. $$\mathrm{XeF_2}$$ IV. Zero

Choose the correct answer from the options given below :

JEE Main 2023 (Online) 30th January Morning Shift
59

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 Evening Shift
60

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

JEE Main 2023 (Online) 29th January Morning Shift
61

The bond dissociation energy is highest for

JEE Main 2023 (Online) 29th January Morning Shift
62

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 :

JEE Main 2023 (Online) 25th January Evening Shift
63

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 Evening Shift
64

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 :

JEE Main 2023 (Online) 24th January Morning Shift
65

Order of Covalent bond;

$$\mathrm{A.~KF > KI ; LiF > KF}$$

$$\mathrm{B.~KF < KI ; LiF > KF}$$

$$\mathrm{C.~SnCl_4 > SnCl_2 ; CuCl > NaCl}$$

$$\mathrm{D.~LiF > KF ; CuCl < NaCl}$$

$$\mathrm{E.~KF < KI ; CuCl > NaCl}$$

Choose the correct answer from the options given below :

JEE Main 2023 (Online) 24th January Morning Shift
66

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

JEE Main 2022 (Online) 29th July Morning Shift
67

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, are :

JEE Main 2022 (Online) 29th July Morning Shift
68

Match List - I with List - II.

List - I List - II
(A) $$\psi_{\mathrm{MO}}=\psi_{\mathrm{A}}-\psi_{\mathrm{B}}$$ (I) Dipole moment
(B) $$\mu=Q \times r$$ (II) Bonding molecular orbital
(C) $$\frac{\mathrm{N}_{\mathrm{b}}-\mathrm{N}_{\mathrm{a}}}{2}$$ (III) Anti-bonding molecular orbital
(D) $$\psi_{\mathrm{MO}}=\psi_{\mathrm{A}}+\psi_{\mathrm{B}}$$ (IV) Bond order

Choose the correct answer from the options given below :

JEE Main 2022 (Online) 27th July Evening Shift
69

Given below are two statements.

Statement I: $$\mathrm{O}_{2}, \mathrm{Cu}^{2+}$$, and $$\mathrm{Fe}^{3+}$$ are weakly attracted by magnetic field and are magnetized in the same direction as magnetic field.

Statement II: $$\mathrm{NaCl}$$ and $$\mathrm{H}_{2} \mathrm{O}$$ are weakly magnetized in opposite direction to magnetic field.

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

JEE Main 2022 (Online) 27th July Morning Shift
70

Arrange the following in increasing order of their covalent character.

A. $$\mathrm{CaF}_{2}$$

B. $$\mathrm{CaCl}_{2}$$

C. $$\mathrm{CaBr}_{2}$$

D. $$\mathrm{CaI}_{2}$$

Choose the correct answer from the options given below.

JEE Main 2022 (Online) 26th July Evening Shift
71

Match List-I with List-II :

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

Choose the correct answer from the options given below :

JEE Main 2022 (Online) 26th July Morning Shift
72

Match List I with List II:

List I
(molecule)
List II
(hybridization ; shape)
(A) XeO$$_3$$ (I) sp$$^3$$d ; linear
(B) XeF$$_2$$ (II) sp$$^3$$ ; pyramidal
(C) XeOF$$_4$$ (III) sp$$^3$$d$$^3$$ ; distorted octahedral
(D) XeF$$_6$$ (IV) sp$$^3$$d$$^2$$ ; square pyramidal

Choose the correct answer from the options given below:

JEE Main 2022 (Online) 25th July Evening Shift
73

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
74

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

JEE Main 2022 (Online) 29th June Evening Shift
75

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

JEE Main 2022 (Online) 28th June Evening Shift
76

Identify the incorrect statement for PCl5 from the following.

JEE Main 2022 (Online) 27th June Evening Shift
77

The correct order of increasing intermolecular hydrogen bond strength is :

JEE Main 2022 (Online) 27th June Evening Shift
78

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)
List - II
(Molecules)
(A) T-shaped (I) XeF$$_4$$
(B) Trigonal planar (II) SF$$_4$$
(C) Square planar (III) ClF$$_3$$
(D) See-saw (IV) BF$$_3$$

JEE Main 2022 (Online) 27th June Morning Shift
79

Consider the ions/molecule

O$$_2^ + $$, O2, O$$_2^ - $$, O$$_2^ {2-} $$

For increasing bond order the correct option is :

JEE Main 2022 (Online) 26th June Morning Shift
80

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

(D) C2

(E) B2

Choose the most appropriate answer from the options given below :

JEE Main 2022 (Online) 25th June Morning Shift
81

Number of electron deficient molecules among the following

PH3, B2H6, CCl4, NH3, LiH and BCl3 is

JEE Main 2022 (Online) 25th June Morning Shift
82

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

is, respectively
JEE Main 2022 (Online) 24th June Evening Shift
83
Number of paramagnetic oxides among the following given oxides is ____________.

Li2O, CaO, Na2O2, KO2, MgO and K2O
JEE Main 2021 (Online) 1st September Evening Shift
84
Match List - I with List - II :

JEE Main 2021 (Online) 27th August Morning Shift Chemistry - Chemical Bonding & Molecular Structure Question 138 English
Choose the most appropriate answer from the options given below :
JEE Main 2021 (Online) 27th August Morning Shift
85
Match items of List-I with those of List-II :

List - I
(Property)
List - II
(Example)
(a) Diamagnetism (i) MnO
(b) Ferrimagnetism (ii) $${O_2}$$
(c) Paramagnetism (iii) NaCl
(d) Antiferromagnetism (iv) $$F{e_3}{O_4}$$


Choose the most appropriate answer from the options given below :
JEE Main 2021 (Online) 27th August Morning Shift
86
The bond order and magnetic behaviour of $$O_2^ - $$ ion are respectively :
JEE Main 2021 (Online) 26th August Evening Shift
87
In the following the correct bond order sequence is :
JEE Main 2021 (Online) 25th July Evening Shift
88
Identify the species having one $$\pi$$-bond and maximum number of canonical forms from the following :
JEE Main 2021 (Online) 25th July Evening Shift
89
Match List-I with List-II :

List-I
(Species)
List-II
(Hybrid Orbitals)
(a) $$S{F_4}$$ (i) $$s{p^3}{d^2}$$
(b) $$I{F_5}$$ (ii) $${d^2}s{p^3}$$
(c) $$NO_2^ + $$ (iii) $$s{p^3}d$$
(d) $$NH_4^ + $$ (iv) $$s{p^3}$$
(v) $$sp$$


Choose the correct answer from the options given below :
JEE Main 2021 (Online) 22th July Evening Shift
90
The hybridisations of the atomic orbitals of nitrogen in NO$$_2^ - $$, NO$$_2^ + $$ and NH$$_4^ + $$ respectively are.
JEE Main 2021 (Online) 20th July Evening Shift
91
Amongst the following, the linear species is :
JEE Main 2021 (Online) 17th March Evening Shift
92
A central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is :
JEE Main 2021 (Online) 17th March Morning Shift
93
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 water molecule is 104.5$$^\circ$$.

Reason R : The lone pair - lone pair repulsion of electrons is higher than the bond pair - bond pair repulsion.

In the light of the above statements, choose the correct answer from the options given below :
JEE Main 2021 (Online) 16th March Morning Shift
94
Match List - I with List - II.

List - I (Molecule) List - II (Bond order)
(a) $$N{e_2}$$ (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 :
JEE Main 2021 (Online) 26th February Evening Shift
95
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 :
JEE Main 2021 (Online) 26th February Morning Shift
96
Which among the following species has unequal bond lengths?
JEE Main 2021 (Online) 25th February Evening Shift
97
According to molecular orbital theory, the species among the following that does not exist is :
JEE Main 2021 (Online) 25th February Morning Shift
98
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
99
The correct shape and $$I - I - I$$ bond angles respectively in $$I_3^ - $$ ion are :
JEE Main 2021 (Online) 24th February Evening Shift
100
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 2021 (Online) 24th February Morning Shift
101
The compound that has the largest H–M–H bond angle (M = N, O, S, C) is :
JEE Main 2020 (Online) 5th September Evening Slot
102
The potential energy curve for the H2 molecule as a function of internuclear distance is :
JEE Main 2020 (Online) 5th September Morning Slot
103
The structure of PCl5 in the solid state is :
JEE Main 2020 (Online) 5th September Morning Slot
104
The reaction in which the hybridisation of the underlined atom is affected is :
JEE Main 2020 (Online) 4th September Evening Slot
105
The intermolecular potential energy for the molecules A, B, C and D given below suggests that : JEE Main 2020 (Online) 4th September Morning Slot Chemistry - Chemical Bonding & Molecular Structure Question 166 English
JEE Main 2020 (Online) 4th September Morning Slot
106
Of the species, NO, NO+, NO2+ and NO- , the one with minimum bond strength is :
JEE Main 2020 (Online) 3rd September Morning Slot
107
The shape / structure of [XeF5] and XeO3F2, respectively, are
JEE Main 2020 (Online) 2nd September Evening Slot
108
Match the type of interaction in column A with the distance dependence of their interaction energy in column B
A B
(i) ion-ion (a) $${1 \over r}$$
(ii) dipole-dipole (b) $${1 \over {{r^2}}}$$
(iii) London dispersion (c) $${1 \over {{r^3}}}$$
(d) $${1 \over {{r^6}}}$$
JEE Main 2020 (Online) 2nd September Evening Slot
109
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
110
If AB4 molecule is a polar molecule, a possible geometry of AB4 is
JEE Main 2020 (Online) 2nd September Morning Slot
111
The number of sp2 hybrid orbitals in a molecule of benzene is :
JEE Main 2020 (Online) 9th January Evening Slot
112
If the magnetic moment of a dioxygen species is 1.73 B.M, it may be :
JEE Main 2020 (Online) 9th January Morning Slot
113
Arrange the following bonds according to their average bond energies in descending order :
C–Cl, C–Br, C–F, C–I
JEE Main 2020 (Online) 8th January Evening Slot
114
The bond order and the magnetic characteristics of CN- are :
JEE Main 2020 (Online) 7th January Evening Slot
115
The relative strength of interionic/intermolecular forces in decreasing order is :
JEE Main 2020 (Online) 7th January Morning Slot
116
The dipole of CCl4, CHCl3 and CH4 are in the order :
JEE Main 2020 (Online) 7th January Morning Slot
117
The correct statement among the following is :
JEE Main 2019 (Online) 12th April Morning Slot
118
The oxoacid of sulphur that does not contain bond between sulphur atoms is
JEE Main 2019 (Online) 10th April Morning Slot
119
During the change of O2 to O2- , the incoming electron goes to the orbital :
JEE Main 2019 (Online) 10th April Morning Slot
120
HF has highest boiling point among hydrogen halides, because it has :
JEE Main 2019 (Online) 9th April Evening Slot
121
Among the following species, the diamagnetic molecule is
JEE Main 2019 (Online) 9th April Evening Slot
122
Among the following, the molecule expected to be stabilized by anion formation is :
C2, O2, NO, F2
JEE Main 2019 (Online) 9th April Morning Slot
123
The ion that has sp3d2 hybridization for the central atom, is :
JEE Main 2019 (Online) 8th April Evening Slot
124
The correct statement about ICl5 and $$ICl_4^-$$ is
JEE Main 2019 (Online) 8th April Evening Slot
125
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
126
The covalent alkaline earth metal halide (X = Cl, Br, I) is :
JEE Main 2019 (Online) 8th April Evening Slot
127
The pair that contains two P – H bonds in each of the oxoacids is
JEE Main 2019 (Online) 10th January Evening Slot
128
The type of hybridisation and number of lone pair (s) of electrons of Xe in XeOF4, respectively, are:
JEE Main 2019 (Online) 10th January Morning Slot
129
Two pi and half sigma bonds are present in :
JEE Main 2019 (Online) 10th January Morning Slot
130
In which of the following process, the bond order has increased and paramagnetic character has charged to diamagnetic ?
JEE Main 2019 (Online) 9th January Evening Slot
131
According to molecular orbital theory, which of the following is true with respect to Li2+ and Li2$$-$$ ?
JEE Main 2019 (Online) 9th January Morning Slot
132
Which of the following conversions involves change in both shape and hybridisation ?
JEE Main 2018 (Online) 16th April Morning Slot
133
The incorrect geometry is represented by :
JEE Main 2018 (Online) 16th April Morning Slot
134
Total number of lone pair of electrons in $${\rm I}_3^ - $$ ion is
JEE Main 2018 (Offline)
135
Which of the following compounds contain(s) no covalent bond(s)? KCl, PH3, O2, B2H6, H2SO4
JEE Main 2018 (Offline)
136
According to molecular orbital theory, which of the following will not be a viable molecule?
JEE Main 2018 (Offline)
137
Which of the following best describes the diagram below of a molecular orbital ?
JEE Main 2018 (Online) 15th April Evening Slot Chemistry - Chemical Bonding & Molecular Structure Question 201 English
JEE Main 2018 (Online) 15th April Evening Slot
138
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
139
JEE Main 2018 (Online) 15th April Morning Slot Chemistry - Chemical Bonding & Molecular Structure Question 202 English
In hydrogen azide (above) the bond orders of bond (I) and (II) are :
JEE Main 2018 (Online) 15th April Morning Slot
140
The decreasing order of bond angles in BF3, NH3, PF3 and I3- is :
JEE Main 2018 (Online) 15th April Morning Slot
141
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
142
The group having triangular planar structures is :
JEE Main 2017 (Online) 9th April Morning Slot
143
sp3d2 hybridization is not displayed by :
JEE Main 2017 (Online) 8th April Morning Slot
144
Which of the following is paramagnetic ?
JEE Main 2017 (Online) 8th April Morning Slot
145
Which of the following species is not paramagnetic?
JEE Main 2017 (Offline)
146
The bond angle H - X - H is the greatest in the compound :
JEE Main 2016 (Online) 10th April Morning Slot
147
The group of molecules having identical shape is :
JEE Main 2016 (Online) 9th April Morning Slot
148
The species in which the $\mathrm{N}$ atom is in a state of $s p$ hybridization is :
JEE Main 2016 (Offline)
149
The intermolecular interaction that is dependent on the inverse cube of distance between the molecule is:
JEE Main 2015 (Offline)
150
In which of the following pairs of molecules/ions, both the species are not likely to exist?
JEE Main 2013 (Offline)
151
Stability of the species Li2, $$Li_2^−$$ and $$Li_2^+$$ increases in the order of:
JEE Main 2013 (Offline)
152
In which of the following pairs the two species are not isostructural ?
AIEEE 2012
153
The structure of IF7 is :
AIEEE 2011
154
The hybridization of orbitals of N atom in $$NO_3^-$$, $$NO_2^+$$ and $$NH_4^+$$ are respectively :
AIEEE 2011
155
Among the following the maximum covalent character is shown by the compound :
AIEEE 2011
156
Using MO theory, predict which of the following species has the shortest bond length?
AIEEE 2009
157
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 dissociation energy as compared to that of C - F is
AIEEE 2008
158
Which of the following pair of species have the same bond order?
AIEEE 2008
159
Which of the following species exhibits the diamagnetic behaviour?
AIEEE 2007
160
The charge/size ratio of a cation determines its polarizing power. Which one of the following sequences represents the increasing order of the polarizinig order of the polarizing power of the cationic species, K+, Ca2+, Mg2+, Be2+?
AIEEE 2007
161
In which of the following ionization processes, the bond order has increased and the magnetic behaviour has changed?
AIEEE 2007
162
Which of the following hydrogen bonds is the strongest?
AIEEE 2007
163
The decreasing values of bond angles from NH3 (106o) to SbH3 (91o ) down group-15 of the periodic table is due to
AIEEE 2006
164
In which of the following molecules/ions are all the bonds not equal?
AIEEE 2006
165
Which of the following molecules/ions does not contain unpaired electrons?
AIEEE 2006
166
Which one of the following species is diamagnetic in nature?
AIEEE 2005
167
Lattice energy of an ionic compounds depends upon
AIEEE 2005
168
The correct order of bond angles (smallest first) in H2S, NH3, BF3 and SiH4 is
AIEEE 2004
169
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
170
The states of hybridization of boron and oxygen atoms in boric acid (H3BO3) are respectively
AIEEE 2004
171
Which one of the following has the regular tetrahedral structure?
(Atomic nos : B = 5, S = 16, Ni = 28, Xe = 54)
AIEEE 2004
172
The maximum number of 90° angles between bond pair of electrons is observed in
AIEEE 2004
173
Which one of the following pairs of molecules will have permanent dipole moments for both members
AIEEE 2003
174
The pair of species having identical shapes for molecules of both species is
AIEEE 2003
175
Which one of the following compounds has the smallest bond angle in its molecule?
AIEEE 2003
176
Hybridisation of underline atom changes in
AIEEE 2002
177
Which of the following are arranged in an increasing order of their bond strengths?
AIEEE 2002
178
In which of the following species is the underlined carbon having sp3 hybridisation?
AIEEE 2002
179
Which of the following statements is true?
AIEEE 2002
180
A square planar complex is formed by hybridisation of which atomic orbitals ?
AIEEE 2002
181
In which of the following species the interatomic bond angle is 109o28' ?
AIEEE 2002

Numerical

1

Total number of non-bonded electrons present in NO2$-$ ion based on Lewis theory is ______.

JEE Main 2025 (Online) 29th January Evening Shift
2

The number of molecules/ions that show linear geometry among the following is __________.

$\mathrm{SO}_2, \mathrm{BeCl}_2, \mathrm{CO}_2, \mathrm{~N}_3^{-}, \mathrm{NO}_2, \mathrm{~F}_2 \mathrm{O}, \mathrm{XeF}_2, \mathrm{NO}_2^{+}, \mathrm{I}_3^{-}, \mathrm{O}_3$

JEE Main 2025 (Online) 22nd January Morning Shift
3

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 Evening Shift
4

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

$$\mathrm{N}_2, \mathrm{O}_2, \mathrm{C}_2^{-}, \mathrm{O}_2^{-}, \mathrm{O}_2^{2-}, \mathrm{H}_2^{+}, \mathrm{CN}^{-}, \mathrm{He}_2^{+}$$

JEE Main 2024 (Online) 9th April Morning Shift
5

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

$$\mathrm{C}_2, \mathrm{O}_2, \mathrm{Be}_2, \mathrm{Li}_2, \mathrm{Ne}_2, \mathrm{~N}_2, \mathrm{He}_2$$

JEE Main 2024 (Online) 8th April Evening Shift
6

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

$$\mathrm{CO}_2, \mathrm{NO}_2, \mathrm{H}_2 \mathrm{SO}_4, \mathrm{BF}_3, \mathrm{CH}_4, \mathrm{SiF}_4, \mathrm{ClO}_2, \mathrm{PCl}_5, \mathrm{BeF}_2, \mathrm{C}_2 \mathrm{H}_6, \mathrm{CHCl}_3, \mathrm{CBr}_4$$

JEE Main 2024 (Online) 8th April Morning Shift
7

Consider the following reactions

JEE Main 2024 (Online) 6th April Evening Shift Chemistry - Chemical Bonding & Molecular Structure Question 24 English

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

JEE Main 2024 (Online) 6th April Evening Shift
8

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

$$\mathrm{NH}_3, \mathrm{SO}_2, \mathrm{SiO}_2, \mathrm{BeCl}_2, \mathrm{C}_2 \mathrm{H}_2, \mathrm{C}_2 \mathrm{H}_4, \mathrm{BCl}_3, \mathrm{HCHO}, \mathrm{C}_6 \mathrm{H}_6, \mathrm{BF}_3, \mathrm{C}_2 \mathrm{H}_4 \mathrm{Cl}_2$$

JEE Main 2024 (Online) 6th April Evening Shift
9

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

JEE Main 2024 (Online) 6th April Morning Shift Chemistry - Chemical Bonding & Molecular Structure Question 21 English

JEE Main 2024 (Online) 6th April Morning Shift
10

Number of compounds from the following with zero dipole moment is _________.

$$\mathrm{HF}, \mathrm{H}_2, \mathrm{H}_2 \mathrm{~S}, \mathrm{CO}_2, \mathrm{NH}_3, \mathrm{BF}_3, \mathrm{CH}_4, \mathrm{CHCl}_3, \mathrm{SiF}_4, \mathrm{H}_2 \mathrm{O}, \mathrm{BeF}_2$$

JEE Main 2024 (Online) 5th April Evening Shift
11

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

JEE Main 2024 (Online) 5th April Morning Shift
12

Number of compounds / species from the following with non-zero dipole moment is _________.

$$\mathrm{BeCl}_2, \mathrm{BCl}_3, \mathrm{NF}_3, \mathrm{XeF}_4, \mathrm{CCl}_4, \mathrm{H}_2 \mathrm{O}, \mathrm{H}_2 \mathrm{~S}, \mathrm{HBr}, \mathrm{CO}_2, \mathrm{H}_2, \mathrm{HCl}$$

JEE Main 2024 (Online) 4th April Evening Shift
13

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

$$\mathrm{O}_2, \mathrm{O}_2^{-1}, \mathrm{NO}, \mathrm{CN}^{-1}, \mathrm{O}_2^{2-}$$

JEE Main 2024 (Online) 4th April Morning Shift
14
The number of molecules/ion/s having trigonal bipyramidal shape is _______.

$\mathrm{PF}_5, \mathrm{BrF}_5, \mathrm{PCl}_5,\left[\mathrm{Pt} \mathrm{Cl}_4\right]^{2-}, \mathrm{BF}_3, \mathrm{Fe}(\mathrm{CO})_5$
JEE Main 2024 (Online) 1st February Morning Shift
15
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) 1st February Morning Shift
16

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 is _________ $$\times 10^{-1}$$ esu.

(Given $$1 \mathrm{~D}=10^{-18}$$ esucm)

JEE Main 2024 (Online) 31st January Evening Shift
17

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

$$\mathrm{NH}_3, \mathrm{SO}_2, \mathrm{SiO}_2, \mathrm{BeCl}_2, \mathrm{CO}_2, \mathrm{H}_2 \mathrm{O}, \mathrm{CH}_4, \mathrm{BF}_3$$

JEE Main 2024 (Online) 31st January Morning Shift
18

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) 30th January Morning Shift
19

The total number of molecules with zero dipole moment among $$\mathrm{CH}_4, \mathrm{BF}_3, \mathrm{H}_2 \mathrm{O}, \mathrm{HF}, \mathrm{NH}_3, \mathrm{CO}_2$$ and $$\mathrm{SO}_2$$ is ________.

JEE Main 2024 (Online) 29th January Evening Shift
20

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 Evening Shift
21

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

$$\mathrm{H}_2, \mathrm{He}_2^{+}, \mathrm{O}_2^{+}, \mathrm{N}_2^{2-}, \mathrm{O}_2^{2-}, \mathrm{F}_2, \mathrm{Ne}_2^{+}, \mathrm{B}_2$$

JEE Main 2024 (Online) 29th January Morning Shift
22

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

$$\mathrm{O}_3, \mathrm{H}_2 \mathrm{O}, \mathrm{SF}_4, \mathrm{ClF}_3, \mathrm{NH}_3, \mathrm{BrF}_5, \mathrm{XeF}_4$$

JEE Main 2024 (Online) 29th January Morning Shift
23

The number of non-polar molecules from the following is _________. $$\mathrm{HF}, \mathrm{H}_2 \mathrm{O}, \mathrm{SO}_2, \mathrm{H}_2, \mathrm{CO}_2, \mathrm{CH}_4, \mathrm{NH}_3, \mathrm{HCl}, \mathrm{CHCl}_3, \mathrm{BF}_3$$

JEE Main 2024 (Online) 27th January Evening Shift
24

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

JEE Main 2024 (Online) 27th January Morning Shift
25

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

$$\mathrm{ClO}_{3}{ }^{-}, \mathrm{XeF}_{4}, \mathrm{SF}_{4}$$ and $$\mathrm{I}_{3}{ }^{-}$$

JEE Main 2023 (Online) 11th April Evening Shift
26

The number of molecules from the following which contain only two lone pair of electrons is ________

$$\mathrm{H}_{2} \mathrm{O}, \mathrm{N}_{2}, \mathrm{CO}, \mathrm{XeF}_{4}, \mathrm{NH}_{3}, \mathrm{NO}, \mathrm{CO}_{2}, \mathrm{~F}_{2}$$

JEE Main 2023 (Online) 10th April Evening Shift
27

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
28

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

JEE Main 2023 (Online) 10th April Morning Shift
29

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

$$\mathrm{XeF}_{5}^{+}, \mathrm{XeO}_{3}, \mathrm{XeO}_{2} \mathrm{~F}_{2}, \mathrm{XeF}_{5}^{-}, \mathrm{XeO}_{3} \mathrm{~F}_{2}, \mathrm{XeOF}_{4}, \mathrm{XeF}_{4}$$

JEE Main 2023 (Online) 8th April Evening Shift
30

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

JEE Main 2023 (Online) 8th April Morning Shift
31

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

$$\mathrm{XeF}_{4}, \mathrm{SF}_{4}, \mathrm{SiF}_{4}, \mathrm{BF}_{4}^{-}, \mathrm{BrF}_{4}^{-},\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+},\left[\mathrm{FeCl}_{4}\right]^{2-},\left[\mathrm{PtCl}_{4}\right]^{2-}$$

JEE Main 2023 (Online) 6th April Evening Shift
32

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

JEE Main 2023 (Online) 6th April Evening Shift
33

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

$$\mathrm{PF}_{5}, \mathrm{BrF}_{4}^{-}, \mathrm{IF}_{5}, \mathrm{BrF}_{5}, \mathrm{XeOF}_{4}, \mathrm{ICl}_{4}^{-}$$

JEE Main 2023 (Online) 6th April Morning Shift
34
Amongst the following, the number of species having the linear shape is _________.

$\mathrm{XeF}_{2}, \mathrm{I}_{3}^{+}, \mathrm{C}_{3} \mathrm{O}_{2}, \mathrm{I}_{3}^{-}, \mathrm{CO}_{2}, \mathrm{SO}_{2}, \mathrm{BeCl}_{2}$ and $\mathrm{BCl}_{2}^{\ominus}$
JEE Main 2023 (Online) 31st January Evening Shift
35

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

JEE Main 2023 (Online) 29th January Morning Shift
36

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

JEE Main 2023 (Online) 25th January Morning Shift
37

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

Amongst the above molecule(s)/ion(s), the number of molecule(s)/ion(s) having $$\mathrm{sp}^{3}\mathrm{~d}^{2}$$ hybridisation is __________.

JEE Main 2022 (Online) 29th July Evening Shift
38

The number of paramagnetic species among the following is ___________.

$$\mathrm{B}_{2}, \mathrm{Li}_{2}, \mathrm{C}_{2}, \mathrm{C}_{2}^{-}, \mathrm{O}_{2}^{2-}, \mathrm{O}_{2}^{+}$$ and $$\mathrm{He}_{2}^{+}$$

JEE Main 2022 (Online) 28th July Morning Shift
39

The number of interhalogens from the following having square pyramidal structure is :

$$\mathrm{ClF}_{3}, \mathrm{IF}_{7}, \mathrm{BrF}_{5}, \mathrm{BrF}_{3}, \mathrm{I}_{2} \mathrm{Cl}_{6}, \mathrm{IF}_{5}, \mathrm{ClF}, \mathrm{ClF}_{5}$$

JEE Main 2022 (Online) 28th July Morning Shift
40

The number of molecule(s) or ion(s) from the following having non-planar structure is ____________.

$$\mathrm{NO}_{3}^{-}, \mathrm{H}_{2} \mathrm{O}_{2}, \mathrm{BF}_{3}, \mathrm{PCl}_{3}, \mathrm{XeF}_{4}, \mathrm{SF}_{4}, \mathrm{XeO}_{3}, \mathrm{PH}_{4}^{+}, \mathrm{SO}_{3},\left[\mathrm{Al}(\mathrm{OH})_{4}\right]^{-}$$

JEE Main 2022 (Online) 27th July Evening Shift
41

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

$$\mathrm{Na}_{2} \mathrm{O}, \mathrm{KO}_{2}, \mathrm{NO}_{2}, \mathrm{~N}_{2} \mathrm{O}, \mathrm{ClO}_{2}, \mathrm{NO}, \mathrm{SO}_{2}, \mathrm{Cl}_{2} \mathrm{O}$$

JEE Main 2022 (Online) 27th July Morning Shift
42

According to MO theory, number of species/ions from the following having identical bond order is ________.

$$\mathrm{CN}^{-}, \mathrm{NO}^{+}, \mathrm{O}_{2}, \mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{2+}$$

JEE Main 2022 (Online) 27th July Morning Shift
43

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

JEE Main 2022 (Online) 25th July Evening Shift
44

Among the following species

$$\mathrm{N}_{2}, \mathrm{~N}_{2}^{+}, \mathrm{N}_{2}^{-}, \mathrm{N}_{2}^{2-}, \mathrm{O}_{2}, \mathrm{O}_{2}^{+}, \mathrm{O}_{2}^{-}, \mathrm{O}_{2}^{2-}$$

the number of species showing diamagnesim is _______________.

JEE Main 2022 (Online) 25th July Morning Shift
45

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) 30th June Morning Shift
46

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

JEE Main 2022 (Online) 28th June Morning Shift
47

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

JEE Main 2022 (Online) 26th June Evening Shift
48

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

JEE Main 2022 (Online) 25th June Evening Shift
49
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) 1st September Evening Shift
50
According to molecular orbital theory, the number of unpaired electron(s) in $$O_2^{2 - }$$ is :
JEE Main 2021 (Online) 31st August Evening Shift
51
The number of hydrogen bonded water molecule(s) associated with stoichiometry CuSO4.5H2O is ____________.
JEE Main 2021 (Online) 31st August Morning Shift
52
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) 27th August Evening Shift
53
AB3 is an interhalogen T-shaped molecule. The number of lone pairs of electrons on A is __________. (Integer answer)
JEE Main 2021 (Online) 26th August Morning Shift
54
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 Evening Shift
55
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) 27th July Morning Shift
56
The number of lone pairs of electrons on the central I atom in I$$_3^ - $$ is ____________.
JEE Main 2021 (Online) 20th July Morning Shift
57
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$$_4^ - $$, ClF3, AsF3, PCl5, BrF5, XeF4, SF6
JEE Main 2021 (Online) 18th March Evening Shift
58
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 2.5. The total number of electrons in AX is __________. (Round off to the Nearest Integer).
JEE Main 2021 (Online) 18th March Morning Shift
59
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 2021 (Online) 25th February Morning Shift
60
The number of Cl = O bonds in perchloric acid is, "________".
JEE Main 2020 (Online) 6th September Morning Slot
61
Chlorine reacts with hot and concentrated NaOH and produces compounds (X) and (Y). Compound (X) gives white precipitate with silver nitrate solution. The average bond order between CI and O atoms in (Y) is.
JEE Main 2020 (Online) 7th January Morning Slot

MCQ (More than One Correct Answer)

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