Chemical Bonding and Molecular Structure

Which of the following has non-zero dipole moment value?

[Re-NEET 2024]

In ${\mathrm{SO}}_2,{\mathrm{NO}}_2^{-}$ and ${\mathrm{N}}_3^{-}$the hybridisations at the central atom are, respectively,

Which of the following molecules(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 :

Number of $\mathrm{\sigma } \mathrm{and} \mathrm{\pi }$ bonds respectively in hex-1-en-4-yne are:

Memory Based Question 29/Jan/25 Evening shift

The correct statement/s about Hydrogen bonding is/are
A. Hydrogen bonding exists when $\mathrm{H}$ is covalently bonded to the highly electronegative atom.
B. Intermolecular H bonding is present in o-nitro phenol
C. Intramolecular H bonding is present in $\mathrm{HF}$
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:

[JEE Main 2024, 4 Apr (Shift 2)]

Total number of lone pair of electron in \( \mathrm{I}_{3}^{-} \)ion is:

Given below are two statements:

Statement-I: Oxygen-oxygen bond length in ozone is greater than dioxygen

Statement-II: $\mathrm{O}-\mathrm{O}$ bond order in ozone is 1.5 and $\mathrm{O}-\mathrm{O}$ bond order in dioxygen is 2.0

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

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 $3d_{x^2-y^2}$

The hybridisation scheme for the central atom includes a d-orbital contribution in

Identify the correct orders against the property mentioned
A. ${\mathrm{H}}_2\mathrm{O}>{\mathrm{NH}}_3>{\mathrm{CHCl}}_3$ - dipole moment
B. ${\mathrm{XeF}}_4>{\mathrm{XeO}}_3>{\mathrm{XeF}}_2$- number of lone pairs on central atom
C. $\mathrm{O}-\mathrm{H}>\mathrm{C}-\mathrm{H} >\mathrm{N}-\mathrm{O}$ - bond length
D. ${\mathrm{N}}_2>{\mathrm{O}}_2>{\mathrm{H}}_2-$ bond enthalpy

Choose the correct answer from the options given below :

Total number of sigma $\left(\sigma \right)$ ______ and $pi\left(\pi \right)$ _______ bonds respectively present in hex-1-en-4-yne are

[JEE Main 2025, 29 Jan (Shift 2)]

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:

Identify the correct statement.

[NEET 2024]

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, 2 Apr (Shift 2)]

Identify the incorrect statement about \(PCl _5\)

Given below are two statements:

Statement-I: Oxygen-oxygen bond length in ozone is greater than dioxygen

Statement-II: $\mathrm{O}-\mathrm{O}$ bond order in ozone is 1.5 and $\mathrm{O}-\mathrm{O}$ bond order in dioxygen is 2.0

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

Arrange the following compounds in increasing order of their dipole moment : $\mathrm{HBr}, {\mathrm{H}}_2\mathrm{S}, {\mathrm{NF}}_3 \mathrm{and} {\mathrm{CHCl}}_3$

Given below are two statements :

Statement (I) : According to the Law of Octaves, the elements were arranged in the increasing order of their atomic number.

Statement (II) : Meyer observed a periodically repeated pattern upon plotting physical properties of certain elements against their respective atomic numbers.

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

The correct increasing order for bond angles among $B{F}_3,P{F}_3$ and $Cl{F}_3$ is :

[JEE Main 2024, 9 Apr (Shift 2)]

Given below are two statements :
Statement (I): Experimentally determined oxygen-oxygen bond lengths in the $O_3$ 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 (O − 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 (O = O) but more than that of a single bond (O − O).
In the light of the above statements, choose the correct answer from the options given below :

[JEE Main 2025, 24 Jan (Shift 2)]

The molecules having square pyramidal geometry are

[JEE Main 2025, 28 Jan (Shift 1)]

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 non-zero dipole moment and highest number of lone-pairs of electrons on the central atom is

[JEE Main 2025, 2 Apr (Shift 1)]