Molecular Orbital Theory

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

The shape of an atomic orbital is determined by the type of the atomic orbital (s, p, d or f), while the shape of a molecular orbital is determined by the shapes of atomic orbitals that make the molecule.

Assertion. Molecular nitrogen is less reactive than molecular oxygen.

Reason. The bond length of ${\mathrm{N}}_2$ is shorter than that of oxygen

Assertion : ${\mathrm{H}}_2$ molecule is more stable than $\mathrm{HeH}$ molecule.

Reason : The anti bonding electron in the molecule destabilises it.

Atomic number of $\mathrm{Cr}, \mathrm{Fe}$ and $\mathrm{Co}$ are $24, 26$ and $27$ respectively. Which of the following inner orbital octahedral complexes are paramagnetic?

In the molecular orbital diagram for the molecular ion ${\mathrm{N}}_2^{+}$ , the number of electrons in the ${\mathrm{\sigma }}_{2\mathrm{p}}$ molecular orbital is

Stability of the species  ${\text{Li}}_2\text{,}{\text{Li}}_2^{-}\text{and}{\text{Li}}_2^{+}$ increases in the order of

After understanding the assertion and reason, choose the correct option.

Assertion: In the bonding molecular orbital (MO) of ${\text{H}}_2,$ electron density is increased between the nuclei.
Reason: The bonding MO is ${\mathrm{\text{ψ}}}_{\mathrm{\text{A}}}+{\mathrm{\text{ψ}}}_{\mathrm{\text{B}}}$ , which shows destructive interference of the combining electron waves.

What will be the bond order of the species with electronic configuration $\mathrm{ }1{\mathrm{s}}^2\mathrm{ }2{\mathrm{s}}^2\mathrm{ }2{\mathrm{p}}^5$?(one/two/three)

If an extra electron is added to the hypothetical molecule ${\mathrm{C}}_2,$ this extra electron will occupy the molecular orbital:-

The diamagnetic species among the following is 

Among the following, the species with identical bond order are

Which among the following species is paramagnetic in nature?

Which of the following order of energies of molecular orbitals is correct for ${\mathrm{N}}_2$?

The correct bond order in the following species is

Which of the following combination of atomic orbitals result into non-bonding?

Choose the incorrect order: