Valence Bond Theory

In which of the following molecules both phenyl rings are not coplanar ?

Which of the following plot represents potential energy of a pair of nuclei as a function of their separation:

Which one of the following does not have ${\mathrm{sp}}^2$ hybridised carbon ?

The correct statement for the structure of ${\mathrm{P}}_4{\mathrm{O}}_{10}$ is

The number of sigma and pi bonds in ethyne molecule are respectively,

Which among the following represents zero overlap? 

Which of the following has ${\mathrm{p}}_{\mathrm{\pi }}-{\mathrm{d}}_{\mathrm{\pi }}$ bonding?

Propyne molecule contains $6$ sigma and _____ pi bonds.

The sum of number of sigma and pi bonds formed between two carbon atoms in $\mathrm{C}\mathrm{a}{\mathrm{C}}_2$ are:

Select the correct match : (consider $\mathrm{z}-$ axis as internuclear axis)

Degree of unsaturation for given compound will be:

Geometry of which of the following can't be explained using $\mathrm{V}.\mathrm{B}.\mathrm{T}.$ (pure overlapping)

In which of the following species central atom forms compound in $2^{\mathrm{nd}}$ excited state, if excitation is considered to be true ?

Which of the following overlapping results in formation of $\sigma$-bond, if $\mathrm{z}-\mathrm{axis}$ is taken as internuclear axis ?

$\mathrm{C}-\mathrm{C}$ sigma and $\mathrm{\pi }$ bond in given molecule is:-

${\mathrm{CH}}_2=\mathrm{C}{\left({\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_3\right)}_2$

Assuming all non-hydrogen atoms undergo hybridization & following are various categories of orbital overlapping.

${\mathrm{sp}}^3-{\mathrm{sp}}^3$ axial overlap $\left(\mathrm{\sigma }\right)⟶$ Type $-\mathrm{A}$

${\mathrm{sp}}^2-{\mathrm{sp}}^2$ axial overlap $\left(\mathrm{\sigma }\right)⟶$ Type $-\mathrm{B}$

${\mathrm{sp}}^3-{\mathrm{sp}}^2$ axial overlap $\left(\mathrm{\sigma }\right)⟶$ Type $-\mathrm{C}$

$\mathrm{p}-\mathrm{p}$ lateral ovelap $\left(\mathrm{\pi }\right)⟶$ Type $-\mathrm{D}$

$\mathrm{p}-\mathrm{d}$ lateral overlap $\left(\mathrm{\pi }\right)⟶$ Type $-\mathrm{E}$

Identify the species which contain only $2$ of these types (from $\mathrm{A}$ to $\mathrm{E}$) of overlapping of orbitals.

The no. of $\sigma$ and $\pi$ bonds are present in given compound.

Which of the following combinations of atomic orbitals can form only one type of covalent bond (out of $\mathrm{\sigma }, \mathrm{\pi } \& \mathrm{\delta }$ bond) :-

Correct order of extent of axial overlapping is :-