Bond Parameters and Resonance

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JEE Advanced 2026

The correct order of dipole moments for the given species is

BF_{3} = NH_{4}^{+} < NF_{3} < NH_{3}

(B)

BF_{3} < NH_{4}^{+} < NF_{3} < NH_{3}

(C)

NH_{4}^{+} < BF_{3} < NH_{3} < NF_{3}

(D)

BF_{3} < NH_{4}^{+} < NH_{3} < NF_{3}

JEE Advanced 2015

LEVELJEE Main

The total number of lone pairs of electrons in $N_{2} O_{3}$ is :

JEE Advanced 2019

LEVELJEE Advanced

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 ______.

JEE Advanced 2020

LEVELJEE Main

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?

JEE Advanced 2014

LEVELJEE Advanced

Hydrogen bonding plays a central role in the following phenomena

* Multiple Correct Options

(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

LEVELJEE Main

The number and type of bonds between two carbon atoms in calcium carbide are

The interaction energy of London forces between two particles is proportional to $r^{x}$ , where $r$ is the distance between the particles. The value of $x$ is

(A)

3

(B)

- 3

(C)

- 6

(D)

6

LEVELJEE Main

Lattice energy of an ionic compound depends upon

(A)

charge on the ion and size of the ion

charge on the ion only

LEVELJEE Main

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

(A)

FeCl_{2}

(B)

SnCl_{2}

(C)

AlCl_{3}

(D)

MgCl_{2}

JEE Main 2007

LEVELJEE Main

The charge/size ratio of a cation determines its polarising power. Which one of the following sequences represents the increasing order of the polarising power of the cationic species, $K^{+}, Ca^{2 +}, Mg^{2 +}, Be^{2 +}$ ?

(A)

Mg^{2 +} < Be^{2 +} < K^{+} < Ca^{2 +}

(B)

Be^{2 +} < K^{+} < Ca^{2 +} < Mg^{2 +}

(C)

K^{+} < Ca^{2 +} < Mg^{2 +} < Be^{2 +}

(D)

Ca^{2 +} < Mg^{2 +} < Be^{2 +} < K^{+}

JEE Main 2021

LEVELJEE Main

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 R is false.

(D)

Both A and R are true but R is not the correct explanation of A.

JEE Main 2020

LEVELJEE Main

Match the type of interaction in column A with the distance dependence of their interaction energy in column B : $Column A (I) Ion-ion (II) Dipole-dipole (III) London dispersion Column B (a) \frac{1}{r} (b) \frac{1}{r ^{2}} (c) \frac{1}{r ^{3}} (d) \frac{1}{r ^{6}}$

(A)

(I)-(b), (II)-(d), (III)-(c)

(B)

(I)-(a), (II)-(b), (III)-(d)

(C)

(I)-(a), (II)-(b), (III)-(c)

(D)

(I)-(a), (II)-(c), (III)-(d)

LEVELJEE Main

Among the following, the maximum covalent character is shown by the compound.

(A)

SnCl_{2}

(B)

AlCl_{3}

(C)

MgCl_{2}

(D)

FeCl_{2}

JEE Main 2020

LEVELJEE Main

Arrange the following bonds according to their average bond energies in descending order $C - C l, C - B r, C - F, C - I$

(A)

C - F > C - C l > C - B r > C - I

(B)

C - B r > C - I > C - C l > C - F

(C)

C - I > C - B r > C - C l > C - F

(D)

C - C l > C - B r > C - I > C - F

JEE Main 2018

LEVELJEE Main

Which of the following compounds contain(s) no covalent bond(s)? $KCl, PH_{3}, O_{2}, B_{2} H_{6}, H_{2} SO_{4}$

(A)

KCl, B_{2} H_{6}, PH_{3}

(B)

KCl, H_{2} SO_{4}

(C)

KCl

(D)

KCl, B_{2} H_{6}

JEE Main 2021

LEVELJEE Main

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

(A)

SO_{3}

(B)

O_{2}

(C)

SO_{2}

(D)

CO_{3}^{2 -}

JEE Main 2020

LEVELJEE Main

The dipole moments of $CCl_{4}$ , $CHCl_{3}$ and $CH_{4}$ are in the order

(A)

CCl_{4} < CH_{4} < CHCl_{3}

(B)

CH_{4} < CCl_{4} < CHCl_{3}

(C)

CH_{4} = CCl_{4} < CHCl_{3}

(D)

CHCl_{3} < CH_{4} = CCl_{4}

LEVELJEE Main

The number of types of bonds between two carbon atoms in calcium carbide is

The potential energy curve for the $H_{2}$ molecule as a function of internuclear distance is

If the boiling point of $H_{2} O$ is $373 K$ , the boiling point of $H_{2} S$ will be

(A)

less than

300 K

(B)

equal to

373 K

(C)

more than

373 K

(D)

greater than

300 K

but less than

373 K

JEE Main 2014

LEVELJEE Main

For which of the following molecule significant $μ \neq = 0$ ?

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

(A)

SiF_{4}

and

NO_{2}

(B)

NO_{2}

and

CO_{2}

(C)

NO_{2}

and

O_{3}

(D)

SiF_{4}

and

CO_{2}

LEVELJEE Main

Which of the following hydrogen bond is the strongest?

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

(A)

A-B has the stiffest bond

(B)

D is more electronegative than other atoms

(C)

A-A has the largest bond enthalpy

(D)

A-D has the shortest bond length

JEE Main 2002

LEVELJEE Main

Select the correct statement.

(A)

When a covalent bond is formed, transfer of electrons takes place

(B)

Pure

H_{2} O

does not contain any ion

(C)

A bond is formed when attractive forces overcome repulsive forces

(D)

HF is less polar than HBr

The correct order of dipole moments for the given species is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The total number of lone pairs of electrons in N2​O3​ is :

Hydrogen bonding plays a central role in the following phenomena

The number and type of bonds between two carbon atoms in calcium carbide are

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The interaction energy of London forces between two particles is proportional to rx, where r is the distance between the particles. The value of x is

Lattice energy of an ionic compound depends upon

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

Among the following, the maximum covalent character is shown by the compound.

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Arrange the following bonds according to their average bond energies in descending order C−Cl,C−Br,C−F,C−I

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Which of the following compounds contain(s) no covalent bond(s)? KCl,PH3​,O2​,B2​H6​,H2​SO4​

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Identify the species having one π - bond and maximum number of canonical forms from the following

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The dipole moments of CCl4​, CHCl3​ and CH4​ are in the order

The number of types of bonds between two carbon atoms in calcium carbide is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The potential energy curve for the H2​ molecule as a function of internuclear distance is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } If the boiling point of H2​O is 373 K, the boiling point of H2​S will be

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } For which of the following molecule significant μ=0?

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

Which of the following hydrogen bond is the strongest?

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

Select the correct statement.

The total number of lone pairs of electrons in $N_{2} O_{3}$ is :

The interaction energy of London forces between two particles is proportional to $r^{x}$ , where $r$ is the distance between the particles. The value of $x$ is

Arrange the following bonds according to their average bond energies in descending order $C - C l, C - B r, C - F, C - I$

Which of the following compounds contain(s) no covalent bond(s)? $KCl, PH_{3}, O_{2}, B_{2} H_{6}, H_{2} SO_{4}$

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

The dipole moments of $CCl_{4}$ , $CHCl_{3}$ and $CH_{4}$ are in the order

The potential energy curve for the $H_{2}$ molecule as a function of internuclear distance is

If the boiling point of $H_{2} O$ is $373 K$ , the boiling point of $H_{2} S$ will be

For which of the following molecule significant $μ \neq = 0$ ?