List of top Physical Chemistry Questions on Molecular structure and Chemical bonding

The correct statement(s) about ⁴D_5/2 state of an atom is (are) :

The shape of SCN¯ is

A pair of isosteric compounds is

B₂ and C₂, respectively, are

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

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

Consider the following reaction sequence where M and N are the major products.
The correct option(s) is (are)

Ψ₁, Ψ₂, Ψ₃ and Ψ₄ are four Hückel molecular orbitals of benzene with orbital energies E₁, E₂, E₃, and E₄, respectively.
Ψ₁ = \(\frac{1}{2}\)(Ф_B + Ф_C - Ф_E - Ф_F)
Ψ₂ = \(6^{-\frac{1}{2}}\)(Ф_A - Ф_B + Ф_C - Ф_D + Ф_E - Ф_F)
Ψ₃ = \(6^{-\frac{1}{2}}\)(Ф_A + Ф_B + Ф_C + Ф_D + Ф_E - Ф_F)
Ψ₄ = \(12^{-\frac{1}{2}}\)(2Ф_A + Ф_B - Ф_C - 2Ф_D - Ф_E + Ф_F)
The correct order of the orbital energies is
(The six carbon atoms of benzene are denoted by A to F and Ф_J, is the 2p_z, orbital of J^th carbon of benzene.)

The molecule(s) that follow(s) 𝐼_𝑎< 𝐼_𝑏=𝐼𝑐 (𝐼_𝑎, 𝐼_𝑏, and 𝐼_𝑐 are the principal moments of inertia) is/are

The spin-only magnetic moment of B₂ molecule is_____ μ_𝐵 .
(round off to two decimal places)